No.  1722 


INSTRUCTIONS 

FOR  MOUNTING,  USING,  AND  CARING  FOR 

BARBETTE  CARRIAGE 

Model  of  1917 

FOR 

12-INCH  GUN 

Model  of  1895  Ml 


(THIRTEEN  PLATES) 


AUGUST  8,  1917 


WASHINGTON 

GOVERNMENT  PRINTING  OFFICE 

1917 


No.  1722 


INSTRUCTIONS 

FOR  MOUNTING,  USING,  AND  CARING  FOR 

BARBETTE  CARRIAGE 

Model  of  1917 

FOR 

12-INCH  GUN 

Model  of  1895  Ml 


(THIRTEEN  PLATES) 


AUGUST  8,  1917 


WASHINGTON 

GOVERNMENT  PRINTING  OFFICE 

1917 


Digitized  by  the  Internet  Archive 

in  2007  with  funding  from 

IVIicrosoft  Corporation 


http://www.archive.org/details/forminstructionsOC)unitrich 


TABLE  OF  CONTENTS. 


List  of  plates 4 

General  description .' 5 

Emplacement 5 

Carriage 5 

The  action  of  the  carriage 5- 

Principal  parts ■ 5 

Base  ring , 5 

Traversing  roller  system 6 

Racer 6 

Side  frames .' .      6 

Working  platform 7 

Cradle 7 

Recoil  and  counter  recoil  system 7 

Elevating  system ^ .  8 

Traversing  system 10 

Azimuth  circle  and  pointer 11 

Sight 11 

Range  disk 11 

Lighting  apparatus : 12 

Firing  mechanism 12 

Shot  tongs 12 

Grease  cups 12 

Implements 12 

Assembly 12 

Base  ring 13 

Leveling 13 

Distance  ring  and  traversing  rollers 13 

Racer 13 

Clips - 14 

Azimuth  circle 14 

Rear  bracket 14 

Recoil  cylinder  assembled  to  cradle 14 

Cradle 14 

Elevating-screw  beam 14 

Traversing  bracket •. 14 

Front  transom 14 

Working  platform 14 

Spring  cylinders  secured  to  cradle 14 

Gun 14 

Spring  system  assembled 14 

Gearing,  etc 14 

Important  points 14 

Care  of  the  mount 15 

List  of  weights 15 

List  of  parts 16 

Contents  of  armament  chest 16 

Abbreviations 17 

Piece,  number,  location,  and  material 17 

(3) 

365277 


LIST  OF  PLATES. 


Plate  No.  Drawing  No. 

I,  Emplacement 10-15-5 

II.  Longitudinal  sections 10-15-6 

III.  Left  and  rear  elevations 10-15-7 

IV.  Right  and  front  elevations 10-15-8 

V.  Base  ring : 10-15-9 

VI.  Racer 10-15-11 

VII.  Cradle 10-15-26 

VIII.  Spring  and  recoil  cylinder  assemblies 10-15-28 

IX.  Recoil  cylinder 10-15-29 

X.  Elevating  gear  assembly 10-15-42 

~KI.  Power  assembly 10-15-47 

XII.  Traversing  gear  assembly 10-15-63 

XIII.  Spring  compressor 10-15-86 

(4) 


INSTRUCTIONS 


MOUNTING,  USING,  AND  CARING  FOR  BARBETTE  CARRIAGES,  MODEL  OF 
1917,  FOR  12-INCH  GUNS,  MODEL  OF  1895  Ml. 


(13  Plates.) 


(The  parts  in  italics  are  of  particular  importance  or  concern  the  safety  of  the  carriage 
and  should  be  especially  noted.) 


GENERAL  DESCRIPTION. 

Emplacement  (Plate  I). — The  emplacements  for  these  carriages 
are  constructed  entirely  of  concrete  with  a  low  parapet  and  permit  of 
360°  traverse.  Thirty-six  foundation  bolts  for  holding  the  base  ring 
are  set  in  the  concrete  when  it  is  laid,  and  12  depressions  are  made  for 
thrust  plates. 

The  Carriage  (Plates  II,  III,  and  IV). — The  carriage  is  of  the 
Barbette  type,  mounting  a  12-inch  gun,  model  1895  M-1.  The  action 
of  the  carriage  is  as  foUows: 

Upon  firing,  the  gun  travels  to  the  rear  30  inches  in  recoil  in  the 
cradle,  carrying  with  it  the  piston  in  the  cyHnder.  A  portion  of  the 
energy  of  recoil  sufficient  to  return  the  gun  to  its  firing  position  is 
absorbed  by  the  counterrecoil  springs.  The  return  of  the  gun  to  the 
firing  position  is  eased  by  the  action  of  the  counterrecoil  buffer. 

Principal  Parts. — The  principal  parts  of  the  carriage  are:  The 
base  ring,  distance  ring,  traversing  rollers,  racer,  side  frames,  plat- 
forms, cradle,  transoms  and  clips,  spring  and  recoil  cylinders,  ele- 
vating system,  traversing  system,  sight,  fighting  and  firing  circuits^ 
and  electrical  and  motor  equipment. 

The  accessories  consist  of  shot  trucks,  shot  tongs,  and  implements. 

Base  King  (Plate  V). — The  base  ring  is  made  of  cast  steel  No.  2, 
and  is  a  W-shaped  section,  which  gives  vertical  rigidity  when  leveling 
and  releveling.  The  top  of  the  middle  member  is  machined  to  form 
the  conical  roller  path.  The  base  ring  is  made  in  two  sections,  bolted 
together  by  eighteen  2^-inch  bolts.  It  is  drilled  for  36  foundation 
bolts,  12  levefing  screw  holes,  and  10  holes  tapped  for  2^-inch  stand- 
ard pipe  for  the  pouring  of  grout.     The  outside  diameter  of  the  base 

(5) 


ring  is  IS  feot  4  iiK^fes.  "^lie  base  ring  has  the  lower  roller  path  on 
its  upper  surface  and  has  an  annular  flange  on  its  inner  edge  forming 
the  pintle  for  the  carriage.  The  traversing  rack  is  bolted  to  the 
inner  side  of  the  annular  ring.  The  cavities  on  the  outside  of  the 
roller  path  are  drained  through  pipes  inserted  in  the  casting  into 
the  pockets  on  the  inner  side  of  the  roller  path.  The  inner  pockets 
are  drained  into  the  well  in  the  center  of  the  carriage. 

The  wrench  holes  on  the  inside  of  the  base  ring  are  provided  with 
a  cover  having  a  1-inch  drain  "hole. 

Traversing-Roller  System. — The  racer  rests  and  is  traversed 
upon  24  rollers  whose  axes  are  maintained  in  a  radial  position  by 
bearings  bolted  to  a  distance  ring.  The  rollers  are  of  cast  steel  No.  3 
and  are  soHd,  with  an  axle  or  traversing-toUer  pin  forced  into  a  hole 
bored  in  the  center  of  the  roller.  The  distance  ring  is  of  cast  steel  in 
six  sections,  bolted  together.  Bearings  of  bronze  No.  3  for  the 
traversing-roUer  pins  are  bolted  to  the  uppe£,§ide  of  the  distance  ring. 
These  bearings  are  provided  with  a  loop  at  the^top  by  means  of  which 
the  traversing  roller  may  be  hf  ted  out  through  holes  in  the  top  of  the 
racer. 

Racer  (PI.  VI).— The  racer  is  of  cast  steel  No.  2,  18  feet  4.5  inches 
in  diameter,  and  is  cast  in  two  pieces,  bolted  together  by  sixteen  2.5- 
inch  bolts.  It  is  of  box  cross  section  and  has  the  upper  roUer  path 
on  its  under  surface.  An  annular  flange  on  its  inner  edge  is  lined 
with  bronze,  fitting  on  the  pintle  of  the  base  ring  with  a  diameter 
clearance  of  0.03  inch.  Upon  its  top  surface  the  side  frames  and 
transoms  are  bolted  and  keyed.  Two  openings  sufiiciently  large  to 
remove  a  traversing  roller  are  provided  at  each  side  of  the  racer. 
The  holes  are  kept  habitually  covered  by  steel  plates  provided  for 
this  purpose.  Four  oil  holes  passing  through  the  racer  are  provided 
for  oiling  the  pintle  surface  and  16  oil  holes  for  oiling  the  traversing- 
roller  bearings.  One  large  steel  clip  secured  to  the  racer  in  front  and 
one  in  the  rear  engage  under  a  continuous  lip  on  the  outside  of  the 
base  ring  and  prevent  possible  overturning. 

Side  Frames. — Two  side  frames,  one  right  and  one  left,  are  bolted 
and  keyed  to  the  upper  side  of  the  racer.  They  are  made  of  cast 
steel  No.  3  and  are  united  at  their  front  end  by  a  transom  and  at  the 
rear  end  by  the  rear  bracket.  On  top  of  each  side  frame  is  a  bear- 
ing for  a  cradle  trunnion.  In  the  lower  part  are  the  bearings  for  the 
elevating  screw  beam.  The  bearings  are  provided  with  liners  or 
bushings  of  bronze  No.  4.  The  cap  squares  are  of  cast  steel  No.  3. 
The  transom  is  of  cast  steel  No.  3  and  provides  a  bolting  surface  for 
the  front  platform  in  addition  to  its  primary  function  of  rigidly 
uniting  the  front  ends  *of  the  side  frames.  The  rear  bracket  is  of 
cast  steel  No.  3,' is  bolted  between  the  rear  ends  of  the  side  frames, 


provides  a  bolting  surface  for  the  side  platform,  and  also  serves  as  a 
platform  at  the  rear  of  the  gun. 

Working  Platform. — The  working  platform  is  attached  to  the 
side  frames  by  means  of  two  front  brackets  and  six  column  brackets. 
The  rear  bracket  also  serves  as  a  support  for  the  working  platform. 
The  tops  of  the  brackets  are  at  a  level  one-half  inch  below  the  level  of 
the  loading  platform  of  the  emplacement.  The  outer  end  of  each  of 
the  column  brackets  is  supported  by  a  cast-steel  column,  the  lower 
end  of  which  is  bolted  to  the  top  side  of  the  racer.  To  the  outer  end 
of  the  brackets  is  bolted  an  angle  iron  bent  to  form  a  circle  11  feet 
7.75  inches  radius.  Steel  plate  one-half  inch  thick  is  bolted  to  the 
brackets  and  angle  iron  to  form  a  working  platform  level  with  the 
loading  platform  of  the  emplacement. 

A  steel  ladder  extends  from  the  racer  to  the  working  platform. 

Cradle  (PL  VII). — The  cradle  is  of  cast  steel  No.  2  and  is  pro- 
vided with  trunnions,  which  rest  in  bearings  in  the  side  frames.  It 
is  bored  on  the  inside  and  fitted  with  eight  liners  of  Tobin  bronze, 
which  support  the  weight  of  the  gun.  Keyways  are  provided  on  top 
and  bottom  in  which  the  key  on  the  gun  fits  to  hold  the  gun  in 
proper  position.  Four  sets  of  lugs,  two  on  the  top  and  two  on  the 
bottom,  are  provided  for  holding  the  four  spring  cylinders.  Between 
the  two  lower  spring  cylinders,  on  the  bottom  of  the  cradle,  is  the 
bearing  for  the  recoil  cylinder. 

Recoil  and  Counter-Recoil  Systems  (Pis.  VIII  and  IX). — The 
recoil  cylinder  is  of  cast  steel  No.  3,  finished  aU  over.  There  are  three 
longitudinal  throttling  grooves  ,45°  wide  cut  in  the  bore  of  the  cyl- 
inder. These  grooves  are  35  inches  long  and  vary  in  depth  from  0 
to  0.5293  inch.  The  recoil-cylinder  head  contains  the  female  part 
of  the  counter-recoil  buffer,  the  corresponding  male  part  being  the 
front  end  of  the  piston  rod.  A  bypass  from  the  counter-recoil  buft'er 
to  the  recoil  cylinder  is  provided  by  means  of  an  0.875-inch  hole  lead- 
ing into  a  1-inch  hole,  which  in  turn  leads  into  the  cyUnder.  The 
adjustment  of  the  counter-recoil  buffer  is  accomplished  by  means  of 
the  adjusting  plug,  the  lower  end  of  which  fits  into  the  0.875-inch 
hole.  The  piston  rod  is  of  forged  steel  C,  to  which  is  screwed  the 
piston,  made  of  bronze  No.  4.  The  rear  end  of  the  piston  rod  is 
threaded  for  the  piston-rod  nuts,  one  front  and  one  rear.  These  nuts 
are  respectively  in  front  and  rear  of  the  yoke  by  means  of  which  the 
recoil  band  of  the  gun  is  connected  to  the  piston  rod.  These  nuts 
are  of  forged  steel  No.  3.  The  front  nut  is  held  in  place  by  a  1-inch 
set  screw,  and  the  rear  nut  is  prevented  from  turning  by  two  clamp- 
ing screws. 

The  piston  rod  passes  through  the  rear«end  of  the  recoil  cylinder 
througli  an  opening  which  is  lined  with  a  bronze  bushing.  The  rear 
end  of  the  cylinder  is  provided  with  a  follower  and  stuffing-box  gland 


of  bronze  and  eight  rings  of  Garlock's  waterproof  hydraulic  packing 
to  prevent  leakage  of  oil.  To  the  front  end  of  the  recoil  cylinder  is 
bolted  the  recoil-cylinder  head,  which  is  of  cast  steel  No.  3,  fitted 
with  a  bronze  bushing  to  prevent  the  cutting  of  the  piston  rod. 

An  expansion  chamber  of  cast  steel  is  placed  on  the  top  of  the 
cradle  and  connected  by  expansion  pipes  of  steel  tubing  1.5  inches 
outside  diameter,  0.25  inch  thick,  to  the  front  end  of  the  cylinder 
head.  At  the  center  of  the  cradle  an  overflow  coupling  is  inserted 
in  the  expansion  pipe.  The  filling  valve  is  of  forged  steel  No.  3, 
and  is  attached  to  the  under  side  of  the  cylinder  at  its  rear  end,  and 
has  a  filling  valve  plug  of  Tobin  bronze.  By  means  of  a  pipe  run- 
ning from  the  under  side  of  the  filling  valve  to  a  funnel  at  the  center 
of  the  cradle,  the  system  may  be  filled.  By  means  of  a  tee  and 
cock,  under  the  filling  valve,  the  oil  may  be  removed  from  the 
system. 

Hydroline  oil  is  used  in  the  recoil  cylinder,  and  with  this  oil  the 
service  pressure  in  the  cylinder  is  1,974  pounds  per  square  inch, 
giving  a  service  pull  on  the  piston  of  460,205  pounds. 

The  counter  recoil  is  accomplished  by  the  counter-recoil  springs 
in  the  spring  cylinders.  There  are  four  spring  cylinders  made  of 
cast  steel,  each  of  which  is  strapped  to  the  cradle  by  means  of  three 
straps  of  cast  steel  No.  2.  The  front  end  of  each  cylinder  is  closed 
by  a  spring  cylinder  head  made  of  cast  steel,  with  eight  0.875-inch 
drill  holes  for  the  escape  of  air.  These  holes  are  also  utilized  for  a 
tit  wrench  by  means  of  which  the  cylinder  head  is  screwed  in  place. 
It  is  held  in  place  by  one  small  set  screw.  The  rear  spring  cylinder 
head  is  similar  to  the  front  one,  but  in  addition  is  provided  with 
a  hole  for  the  spring  rod.  This  hole  is  lined  with  a  No.  2  bronze 
bushing.  Each  cylinder  contains  four  triple-coil  helical  springs, 
made  of  spring  steel,  which  are  carried  on  the  spring  rod  and  sepa- 
rated by  cast-steel  separators  bushed  with  bronze  No.  4.  The  outer 
and  inner  springs  are  wound  right  hand,  and  the  intermediate  spring 
is  wound  left  hand.  The  spring  rod  is  of  forged  steel  No.  3.  At 
the  front  end  is  the  spring-rod  piston  of  bronze,  screwed  on  the  rod 
and  held  in  place  by  the  spring-rod  nut.  On  the  rear  side  of  the 
piston  are  the  bearing  surfaces  for  the  front  ends  of  the  front  springs. 
On  the  rear  end  of  the  rod  is  screwed  a  band  bushing  of  bronze  No.  3, 
which  fits  in  the  recoil  band,  and  is  held  in  place  by  means  of  a  band 
bushing  nut,  which  is  made  of  forged  steel  No.  3.  On  the  inner 
side  of  the  rear  cylinder  head  are  the  bearing  surfaces  for  the  rear 
ends  of  the  rear  springs. 

Elevating  System  (Pis.  X  and  XII). — The  gun  is  elevated  and 
depressed  by  means  of  a  right-hand  elevating  screw  connected  to  the 
gun  by  a  steel  strap  and  actuated  by  the  elevating  nut.  The  ele- 
vating nut  is  driven  by  bevel  gears,  the  elevating-nut  gear  which  is 


9 

keyed  to  the  elevating  nut,  and  the  elevating-nut  pinion  keyed  to 
the  horizontal  shaft.  The  horizontal  shaft  is  driven  by  bevel  gears, 
namely,  the  horizontal  intermediate  gear  keyed  to  the  shaft,  and  the 
vertical  intermediate  pinion.  This  pinion  is  actuated  in  three  ways 
to  be  described  later. 

The  elevating  nut  and  screw  are  supported  in  the  elevating  screw 
beam,  which  is  held  in  bearings  in  the  side  frames.  Ball  bearings 
are  provided  at  both  the  upper  and  lower  ends  of  the  nut. 

Elevation  is  provided  for  between  0°  and  35°,  and  the  elevating 
screw  is  projrided  with  stops  at  these  Umits.  Buffer  cylinders  are 
provided  to  ease  the  action  of  the  stops.  The  buffer  cylinders  are 
supported^ in  yokes,  which  are  bolted  to  the  elevating  screw  beam. 
Longitudinal  grooves  of  varying  depths  are  provided  in  the  c^dinders 
to  regulate  the  flow  of  oil  by  the  pistons.  Steel  springs  are  provided 
to  return  the  pistons  and  stuffing  boxes  and  gaskets  close  the 
cylinders. 

The  elevation  is  accomplished  in  three  ways: 

1 .  Slow  motion  by  handwheel. 

2.  Quick  motion  by  elevating  cranks. 

3.  By  motor  power. 

For  using  the  quick  motion  by  the  elevating  cranks,  the  operating 
lever  is  set  at  "In"  on  the  clutch  stop  plate.  By  means  of  the  upper 
and  lower  connecting  rods  and  the  quick-motion  fork,  the  upper  por- 
tion of  the  quick-motion  clutch  is  pulled  down  against  the  strength 
of  a  spring  and  meshed  with  the  lower  portion.  This  is  in  turn 
meshed  with  the  quick-motion  upper  bevel  gear,  which  is  bolted  to 
the  end  of  the  quick-motion  shaft,  on  the  lower  end  of  which  is  keyed 
the  quick-motion  lower  bevel  gear,  which  in  turn  is  in  mesh  with  the 
crank  gear,  which  is  keyed  to  the  crank  shaft.  The  crank  itself  is 
pinned  on  the  shaft.  The  elevation  is  accomplished  by  turning  the 
elevation  cranks,  the  power  being  transmitted  through  the  above- 
described  chain  of  shafts  and  gears  to  the  upper  portion  of  the  quick- 
motion  clutch,  which  is  keyed  to  the  vertical  shaft.  This  shaft  is 
keyed  inside  of  the  control  sleeve,  which  in  turn  is  keyed  to  the  hand 
clutch.  The  hand  clutch  is  meshed  with  the  vertical  intermediate 
pinion,  and  from  there  the  chain  is  as  previously  described. 

For  slow  motion  the  operating  lever  is  set  at  "Out,"  which  disen- 
gages the  lower  portion  of  the  quick-motion  clutch,  and  thus  omits 
all  that  chain  of  shafts  and  gears  going  to  the  cranks,  but  leaves  the 
remainder  the  same.  The  handwheel  is  connected  to  the  vei'tical 
shaft  by  the  handwheel  shaft  and  the  bevel  handwheel  gears. 

For  operating  by  power,  the  control  sleeve  is  raised  by  one  of  the 
power-clutch  forks,  operated  by  a  treadle  on  the  platform,  so  as  to 
mesh  with  the  control-gear  clutch  and  release  from  mesh  with  the 
vertical  intermediate  pinion.     At  the  same  time  the  power  clutch  is 


10 

raised  by  the  other  power-clutch  fork  and  meshed  with  the  underside 
of  the  vertical  intermediate  pinion.  The  power  clutch  is  keyed  to 
the  vertical  power  shaft,  which  is  connected  to  the  ^^B"  end  of  the 
elevating  motor  shaft  by  the  power  pinion  and  power  gear. 

The  speed  of  elevation  by  power  is  controlled  by  a  Waterbury  Tool 
Co.  hydraulic  elevating  speed  gear,  by  means  of  which  the  rotation  of 
the  ''B  "  end  of  the  shaft  may  be  varied  from  0  to  800  revolutions  per 
minute,  while  the  speed  of  the  '^A"  end  is  constant  with  the  motor 
itself  at  800  revolutions  per  minute.  The  adjustment  is  made  by 
the  speed-gear  control.  After  the  power  clutches  are  thrown  in,  if  it 
is  desired  to  elevate,  the  handwheel  is  turned  in  the  proper  direction 
to  elevate  and  by  a  train  of  gears  previously  described  motion  is 
given  to  the  control  sleeve.  This  sleeve  is  now  in  mesh  with  the  con- 
trol-gear clutch,  which,  by  means  of  the  indicator  gear  and  shaft,  sets 
the  speed  indicator.  At  the  same  time  another  gear  on  the  control- 
gear  clutch  is  meshed  with  a  bevel  gear  on  the  throw-out  shaft.  This 
same  bevel  gear  is  meshed  with  the  upper  control  pinion,  bolted  to  the 
upper  end  of  the  upper  control  shaft.  The  lower  end  of  this  shaft  is 
connected  by  the  beveled  control  gears  to  the  control  mechanism  of 
the  hydraulic  speed  gear,  which  is  thus  set  to  give  the  speed  and 
direction  indicated  on  the  speed  indicator.  To  stop  elevating  by 
power,  the  gun  pointer  simply  moves  the  elevating  handwheel  back 
so  that  the  indicator  reads  0. 

There  is  also  an  automatic  mechanism  to  shut  off  when  the  limiting 
stops  are  reached.  This  is  accomplished  by  means  of  the  throw-out 
mechanism.  Keyed  to  the  horizontal  shaft  is  a  throw-out  pinion, 
which  is  meshed  through  an  idler  to  the  throw-out  gear.  This  gear 
turns  freely  on  the  throw-out  shaft  until  either  0°  or  35°  elevation  is 
reached,  when  the  throw-out  crank  fitted  on  the  throw-out  shaft 
comes  against  the  throw-out  plunger,  which  is  bolted  to  the  gear. 
The  shaft  is  then  turned  by  the  gear,  and,  being  in  mesh  with  the 
upper  control  pinion  and  the  control-gear  clutch,  it  thus  brings  the 
control  back  to  zero  and  shuts  off  the  power  from  the  power  shaft, 
and  at  the  same  time  sets  the  speed  indicator  to  zero  through  the 
chains  of  gears  and  shafts  previously  described. 

Traversing  System  (PI.  XII). — The  traversing  mechanism  con- 
sists of  the  traversing  rack  in  10  segments  attached  to  the  base  ring 
by  80  steel  traversing-rack  screws,  the  traversing  pinion  of  steel  on  a 
vertical  forged-steel  shaft,  provided  with  bearings  in  the  traversing 
bracket,  and  rotating  with  the  carriage,  geared  to  the  steel  crank 
shafts  which  extend  across  the  carriage,  by  means  of  a  traversing 
gear  wheel  and  a  crank  pinion.  The  cranks  are  used  for  norn  al 
traversing.  Slow-motion  traversing  is  provided  for  at  the  telescopic 
sight  by  means  of  a  vertical  slow-motion  shaft,  which  is  in  two  parts, 
bolted  by  a  slow-motion  shaft  coupling.     The  slow-motion  shaft  is 


11 

geared  to  the  handwlieel  shaft  by  means  of  the  slow-motion  gear 
and  the  handwheel  pinion.  The  lower  end  of  the  slow-motion  shaft 
is  geared  to  the  worm  shaft  by  the  slow-motion  pinion  and  the  worm 
shaft  gear.  The  worm  shaft  is  connected  to  the  traversing  shaft 
by  means  of  a  worm,  which  engages  in  a  worm  wheel  provided  with 
a  multiple  disk  friction  drive.  There  are  10  friction  disks,  5  steel 
disks  keyed  to  the  sleeve  of  the  shaft,  and  5  bronze  disks  keyed  to 
the  worm  gear.  A'  clutch,  operated  by  a  treadle  on  the  platform , 
throws  the  slow  motion  in  or  out.  Cast-steel  gear  cases  are  provided 
for  all  gears. 

Azimuth  Circle  and  Pointer. — ^The  azimuth  circle  consists  of  a 
bronze  ring  in  eight  sections.  The  sections  are  of  T  cross  section  for 
rigidity.  Each  section  is  riveted  to  a  steel  support.  These  supports 
are  grooved  so  that  the  eight  sections  when  bolted  together  form  a 
hollow  cylinder  surrounding  the  traversing  rollers  and  thus  serving 
also  as  a  dust  guard.  The  outside  of  each  support  is  stiffened  by 
means  of  two  stiffeners,  which  are  steel  angles,  and  are  riveted  to  the 
supports.  The  sections  are  accurately  bolted  together  by  means  of 
steel  straps.  The  supports  are  bolted  to  the  "base  ring  by  means  of 
bases  permanently  bolted  to  the  outside  of  the  base  ring.  These 
bases  are  all  steel  angles.  The  circle  is  graduated  in  degrees,  but 
not  numbered  until  the  carriage  is  in  its  emplacement. 

A  pomter  case  of  cast  steel  is  placed  in  the  recess  of  the  racer,  which 
exposes  the  top  of  the  circle;  the  pointer  body  is  placed  in  the  case 
and  graduated  and  numbered  as  a  subscale,  to  read  to  ten-hundredths 
of  a  degree,  and  by  means  of  a  graduated  thumb  screw  a  reading  of 
one-hundredth  of  a  degree  can  be  obtained.  The  pointer  is  designed 
to  pennit  final  adjustment  by  means  of  set  screws  on  the  degree  marks 
of  the  circle  at  the  time  the  circle  is  numbered.  The  index  is  of 
German  silver  and  is  carried  in  a  bronze  slide.  A  cast-steel  lid  is 
provided  for  the  case. 

Sight. — The  sight  with  which  this  carriage  is  equipped  is  the  3-inch 
telescopic  sight,  model  1912,  which,  together  with  its  bracket,  is  de- 
scribed in  Ordnance  Pamphlet  No.  1959.  The  bracket  is  mounted 
on  the  upper  end  of  the  sight  standard. 

Range  Disk  and  Pointer. — ^The  range  disk  with  its  pointer  is 
attached  to  the  left  side  frame  within  convenient  view  of  the  man 
at  the  elevating  handwheel  by  means  of  a  range  disk  fulcrum  screwed 
into  the  side  frame.  The  disk  itself  is  of  cast  steel,  to  which  is 
screwed  a  German-silver  range  scale.  The  disk  is  riveted  to  a  range 
disk  gear,  which  is  actuated  by  the  range  disk  rack  attached  to  the 
side  of  the  cradle.  The  backlash  is  taken  up  by  means  of  a  disk 
weight  of  cast  iron  weighing  about  100  pounds,  suspended  by  a  disk 
rope  of  amiealed  galvanized  sash  cord,  which  is  wound  on  the  idler 
sheave  attached  to  the  disk  by  means  of  the  idler  sheave  pin. 


12 

On  the  range  scale  there  are  three  scales.  The  middle  or  reference 
scale  is  graduated  for  every  5°  elevation.  The  outer  or  surface  scale 
and  the  inner  or  subcaliber  scale  are  graduated  for  every  20  yards. 

The  elevation  pointer  is  contained  in  a  worm  housing  of  cast  steel, 
and  is  so  arranged  that  it  can  be  adjusted  for  calibration. 

Lighting  Apparatus. — The  current  for  both  lighting  and  power 
enters  the  pit  at  a  terminal  box  in  the  side  of  the  emplacement  and 
is  brought  into  the  carriage  by  means  of  a  360°  contact,  and  thence 
distributed  by  conduits  to  the  points  at  which  it  is  utilized.  The 
360°  contact  consists  of  a  pedestal  in  the  pit,  carrying  copper  rmgs 
supported  on  an  insulating  plate;  brushes  bearing  on  these  rings  pro- 
vide the  contact.  The  brushes  are  carried  in  a  cap  and  turned  about 
by  arms  bolted  to  the  racer,  and  the  cables  are  connected  through 
stuffing  tubes  to  the  brushes. 

The  sight,  speed  indicator,  range  scale,  and  azimuth  pointer  are 
illuminated  by  2-candlepower  lamps.  Four  16-candlepower  lamps 
controlled  by  5-ampere  water-tight  switches  are  provided  for  general 
illumination  on  the  upper  and  lower  side  frames.  Two  16-candle- 
power portable  lamps  are  also  provided  and  arranged  with  plug  boxes 
on  each  side  frame. 

Firing  Mechanism. — Electric  firing  is  provided  for  by  a  firing 
magneto,  Type  G.  A.,  described  in  Ordnance  Pamphlet  No.  1814. 
It  is  operated  by  the  gun  pointer.  The  firing  cable  is  carried  over 
the  top  of  the  cradle  back  to  the  breech  of  the  gun,  a  loop  being 
provided  to  allow  for  recoil. 

Shot  Tongs. — The  shot  tongs  are  of  the  Gilmartin  type  for  12-inch 
projectiles. 

Grease  Cups  and  Oil  Holes. — ^AU  axles,  trunnions,  and  sliding 
bearing  surfaces  are  provided  with  oil  holes,  there  being  54  in  all. 
Each  is  closed  with  a  screw  oil  plug.  The  principal  bearings  also 
have  grease  cups,  these  being  16  for  the  cradle  and  one  for  each 
cradle  trunnion  bearing. 

Spring  Compressor. — The  spring  compressor  consists  of  a  screw, 
nut,  and  crank  in  a  frame,  which  is  adjusted  to  the  recoil  band. 
The  operation  is  described  on  drawing  10-15-86.     Plate  XIII.) 

instructions  for  assembling  the  carriage. 

In  assembling  the  carriage,  no  part  should  be  directly  struck  with 
a  steel  hammer  or  sledge.  A  wooden  buffer  should  be  interposed,  or 
soft  metal  drifts  or  hammers  should  be  used.  Care  should  be  exer- 
cised to  prevent  the  burring  of  machined  surfaces.  All  bearing  sur- 
faces should  be  clean,  smooth,  and  well  lubricated,  prior  to  assembly. 

In  assembling  the  carriage,  such  blocking,  way-planks,  hydraulic 
jacks,  ropes  and  blocks  and  tackle  as  are  found  at  Coast  Artillery 


13 

forts  are  required.     Also  a  derrick  or  shears  capable  of  lifting  4  or  5 
tons  will  be  very  useful. 

The  following  instructions  are  general  only  and  are  intended  as  a 
guide  for  the  order  of  assembly.  The  work  should  be  under  the 
immediate  supervision  of  an  Ordnance  machinist. 

The  following  description  refers,  particularly,  to  the  order  in 
which  the  parts  should  be  put  together: 

Place  the  two  halves  of  the  base  ring  (9G3  and  9H3)  over  the  plat- 
form by  means  of  skids  and  rollers,  keeping  the  half  marked  '^ Front" 
to  the  front  of  the  battery.  Carefully  remove  all  biirrs  from  the 
finished  faces,  keys,  and  bolts,  oil  the  faces  that  come  together,  and 
assemble  the  base  ring  halves,  with  bolts  (9A),  (9B),  (9C),  and  (9D). 

The  six  bolts  (9A)  should  be  inserted  in  one-half  of  the  base  ring 
before  the  two  halves  are  brought  together,  as  it  is  impossible  to  get 
them  in  otherwise. 

The  tapped  holes  for  leveling  screws  (9K)  should  be  thoroughly 
cleaned  and  the  screws  oiled  and  put  in  place. 

The  base  ring  should  now  be  lowered  down  in  place,  preparatory 
to  leveling,  using  the  thrust  plates  (lOH)  to  support  the  points  of  the 
leveling  screws. 

The  leveling  of  the  base  ring  is  now  conducted  in  a  manner  similar 
to  that  prescribed  in  other  Ordnance  Pamphlets,  and  when  the  level- 
ing is  completed,  grouting  is  done  as  usual. 

After  leveling  the  base  ring,  the  wrench  hole  covers  (lOF)  should 
be  put  on  the  openings  in  the  inner  vertical  surface  of  the  base  ring 
with  the  tap  bolts  (lOG). 

The  sections  of  the  distance  ring  (lOA)  should  be  assembled  over 
the  roller  path  of  the  base  ring  with  the  bolts  (lOB)  and  (IOC).  The 
traversing  rollers  (lOK)  with  beamings  (lOD)  should  now  be  as- 
sembled to  the  distance  ring  with  the  bearing  tap  bolts  (lOE). 
When  assembled,  care  should  be  taken  to  see  that  all  burrs  are 
removed  from  the  finished  surfaces  and  the  lower  roller  path.  The 
distance  ring  with  roller  system  should  be  turned  by  hand  on  the  roller 
path  to  see  that  it  works  properly. 

The  two  halves  of  the  racer  (11B2)  and  11C2)  should  now  be 
brought  over  the  base  ring  and  assembled  together  with  bolts  (llD) 
and  the  racer  joint  bolts  (11  A).  The  joint  bolts  (11  A)  should  be 
inserted  in  one-half  of  the  racer  before  bringing  the  two  halves 
together.  After  assembling,  the  racer  should  be  lowered  on  the* 
roller  system,  and  turned  by  hand  to  see  that  it  turns  freely.  Before 
lowering  the  racer  in  place  all  oil  tubes  and  holes  should  be  cleaned 
out  and  burrs  removed  from  the  roller  path.  As  soon  as  possible,  after 
turning  the  racer  the  roller  covers  {12  hy  1)  azimuth  circle  in  eight  sec- 
tions and  the  azimuth  pointer  case  should  he  put  on  to  prevent  sand  and 
grit  from  getting  into  the  roller  system. 


14 

The  front  clip  (22F)  and  the  rear  dip  (22H)  can  be  now  assembled 
on  the  racer  with  the  tap  bolts  (22G).  Place  the  side  frame  right 
(19B1)  and  the  side  frame  left  (20A1)  in  their  positions  on  the  racer 
and  locate  accurately  in  position  by  the  dowel  pins  (2 IP).  The 
keys  (2 IS)  should  be  put  in  place  and  the  right  side  frame  secured 
to  the  racer  by  the  tap  bolts  (19C).  The  left  side  frame  is  secured 
similarly  by  the  tap  bolts  (20B).  The  rear  bracket  (14E)  can  now 
be  assembled  to  the  side  frames  by  the  bolts  (14F)  and  the  rear 
bracket  studs  (19A). 

The  recoil  cylinder  (29D1)  with  the  cyhnder  head  (30Kl)  and 
the  piston  rod  (30B1)  should  be  assembled  to  the  cradle  and  secured 
by  the  recoil  cylinder  strap  (27F).  Then  the  cradle  should  be 
assembled  in  place  in  the  side  frames.  The  elevating  screw  beam 
(55A1)  and  the  traversing  bracket  (68A)  should  now  be  placed  in 
position.  The  front  transom  (22A1)  can  be  put  in  place,  secured 
to  the  side  frames,  by  the  bolts  (22B)  and  (22C)  and  to  the  racer 
by  the  tap  bolts  (22D)  and  (22E). 

After  the  transom  is  in  place,  the  working  platform  should  be 
assembled  to  the  carriage  to  provide  a  working  floor  when  assembling 
the  spring  system. 

The  spring  cylinders  (35 A2)  are  secured  to  the  cradle  by  the 
spring  cylinder  straps  (27G)  and  (27H)  and  the  spring  tap  bolts 
(27E)  can  now  be  assembled  in  place.  The  spring  cylinder  head 
(35B1)  should  be  removed  from  the  spring  cylinder  and  the  interior 
of  the  cylinder  should  be  slushed. 

The  gun  is  then  mounted. 

The  spring  system  can  now  be  assembled,  using  the  spring  com- 
pressor provided  for  that  purpose  and  following  the  method  of 
procedure  shown  on  Plate  XIII. 

The  gearing  should  now  be  assembled  to  the  carriage  and  all 
adjustments  made.  The  method  of  adjusting  the  elevating  gear 
mechanism  is  described  on  Plate  X. 

IMPORTANT  POINTS. 

1.  The  gun  should  be  elevated  and  depressed  to  extreme  limits 
to  see  that  all  points  function  freely. 

2.  The  carriage  should  be  traversed  through  360°  to  see  that  the 
traversing  mechanism  moves  freely. 

3.  See  that  all  oil  holes  are  clean  and  provided  with  plugs. 

4.  See  that  the  recoil  cylinder  contains  the  proper  amount  of  oil. 

5.  See  that  the  stuffing  box  is  tight. 


15 


CARE    OF    THE    MOUNT. 

General  Instructions. — The  carriage  should  not  he  allowed  to 
remain  in  the  same  'position  for  a  long  time,  d.nd  from,  time  to  time 
should  he  completely  traversed  afid  the  gun  elevated  and  depressed  to 
limits.  All  parts  of  the  carriage  should  be  kept  free  from  rust  at  all 
times.  It  is  forbidden  to  use  sandpaper  on  any  bearings,  piston  rods, 
etc.  Emery  cloth  No.  1  is  coarse  enough  to  remove  any  rust  if  pre- 
viously softened  with  kerosene.  Any  leakage  in  the  hydraulic  recoil 
system  should  he  immediately  repaired. 

Filling  and  Cleaning  Recoil  Cylinder. — The  recoil  cylinder  is 
filled  by  means  of  the  funnel  and  pipe  previously  described  under 
the  description  of  the  recoil  system.  The  gun  should  be  at  zero 
degrees  elevation  when  the  cylinder  is  filled,  and  the  cylinder  should 
be  fiUed  f  uU. 

To  clean  the  recoil  cylinder,  drain  the  cylinder,  loosen  the  stufiing 
box,  and  remove  the  front  cylinder  head  and  the  rear  piston  rod  nut, 
and  take  out  the  piston.     Clean  all  parts  thoroughly  and  reassemble. 

Cleaning  Cradle. — To  clean  the  cradle  and  sliding  surface  of 
the  gun,  dismantle  the  spring  cylinders  by  reversing  the  process  of 
assembly  as  described  on  Plate  XIII;  set  the  gun  at  zero  degrees 
elevation  and  push  it  back  to  extreme  recoil,  by  means  of  blocking 
and  a  hydraulic  jack.  Clean  and  lubricate  all  parts  thoroughly  and 
return  gun  to  normal  position  by  use  of  jack.  Reassemble  the 
spring  cylinders. 

List  of  weights. 


Name  of  part. 


Number  of  pieces. 


Weight 

in 
pounds. 


Leveling  screws  and  plates . 

Base  ring 

Azimuth  circle 

^Distance  ring 

Traversing  rollers 

Racer 

Clips, 


Side  frames , 

Front  transom 

Rear  bracket 

Working  platform  (complete) . 

Cradle 

Recoil  cylinder 

Piston  rod  (complete) ; . . , 

Spring  cylinders , 

Counter  recoil  springs 

Spring  cylinder  rods 


24 

2  halves 

lin  8  sections. 

1  in  6  sections . 
24 

2  halves 

/Front 

\Rear 

2 


Elevating  screw 

Elevating  screw  beam 

Elevating  gear  (complete) 

Traversing  gear  (complete) 

Speed  gear 

Bolts,  nuts,  and  rivets  (complete). 
Electrical  equipment  (complete) . . 


8  springs 

rods  with  pistons,  separators,  and 
band  bushings. 


Set. 


324 

58,800 
3,100 
6,050 
6,792 

66,400 
3,060 
1,685 

46,480 
8,825 
4,400 
7.590 

39,160 
4,610 
2,7«5 
8,080 

14,020 
6,365 

910 
1,820 
2,310 
3,628 

210 
3.630 


16 

List  of  articles  packed  in  armament  chest  for  12-inch  gun,  model  of  1895  Ml,  on  12-inch 
barbette  carriage,  model  of  1917. 

FOR   GUN. 

1  box  containing  firing  mechanism,  cleaning  brushes,  and  reamer  for  primer  seat. 

3  brushes,  cleaning,  for  primer  seat. 

1  cloth,  emery,  1  quire,  No.  00. 

1  drift,  bronze. 

1  drift,  bronze. 

1  file,  fiat,  dead  smooth,  8-inch. 

1  file,  round,  second  cut,  8-inch. 

1  file,  half-round,  smooth,  8-inch. 

1  file,  three-cornered,  8-inch.  '^ 

3  files,  pillar  No.  6,  6-inch. 

3  files,  three-cornered,  No.  4,  6-inch. 

3  files,  half-round,  smooth,  8-inch. 

3  files,  round,  smooth,  8-inch. 

1  gunner's  drill. 

1  gunner's  lanyard. 

1  gunner's  pouch. 

1  gunner's  punch. 

1  gunner's  sleeves,  pair. 

1  hammer,  copper. 

1  hammer,  machinists'  ball  peen,  2  pounds — commercial. 

1  hand  mallet. 

1  mallet,  long  handle. 

1  metal  scraper. 

1  obturator  nut  clamp  screw  wrench. 

1  obturator  nut  wrench. 

1  pin  punch. 

1  pliers,  cutting,  7-inch,  pair. 
10  pounds  waste,  cotton. 

2  pounds  wire,  copper,  No.  12. 

2  pounds  wire,  copper,  No.  16. 
1  pressure  plug  wrench. 

1  reamer,  cleaning,  for  primer  seat. 
1  screw  driver — commercial. 

3  sponges,  wagon.  ' 
1  tit  wrench  for  obturator  spindle. 

4  twine,  balls,  assorted. 
1  wrench,  monkey. 

1  wrench,  monkey. 

FOR  CARRIAGE. 

1  file  card,  commercial. 

2  oilers,  half  pint. 

1  oiler,  locomotive,  1  quart. 

1  pin  wrench,  for  elevating  screw  collar. 

1  roller  lift  hook. 

1  scraper,  24-inch. 

1  screw  driver. 

1  screw  driver. 

1  socket  wrench,  for  distance  ring  bearing. 

1  socket  wrench,  for  recoil  cylinder  head. 

1  spanner  wrench,  for  nut  buffer. 


17 

1  spanner,  for  elevating  pin  nut. 

1  spanner  wrench,  for  friction  adjusting  nuts,  worm  bearing,  and  spring  rod. 

1  spanner  wrench,  for  piston  rod. 

1  spanner  wrench,  for  spring  cylinder  head,  (elevating  nut  collar,  and  recoil  cylinder 

stuffing  box. 
1  wrench,  double,  for  0.5  and  0.625  nuts. 
1  wrench,  double,  for  0.75  and  1  nuts. 
1  wrench,  double,  for  1.25  and  1.5  nuts. 
1  wrench,  double,  for  2  and  2.5  nuts. 

NAMES  OF  PARTS  OF  12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917, 
THEIR  LOCATION,  PIECE-MARKS,  AND  MATERIAL  OF  WHICH  THEY 
ARE  MADE. 

[The  parts  are  listed  alphabetically  under  the  following  headings:  Carriage  proper;  Azimuth  pointe  r; 
Shot  tongs;  Spring  compressor;  Filling  device  and  grease  cups.] 

MEANING   OF  ABBREVIATIONS   IN   COLUMN   OF   MATERIAL. 


Ann.  C Annealed  copper. 

Br Brass. 

Bz Bronze. 

C .♦ Copper. 

C.I Cast  iron. 

C.  S Cast  steel. 

F.  S Forged  steel. 

Fl.  S Flange  steel. 

G.I Galvanized  iron. 

G.  W.  H.  P Garlock    waterproof 

draulic  packing. 
G.  S German  silver. 


hy- 


Lea T  eather. 

R Rubber. 

S Steel. 

Sh.  Bz Sheet  bronze. 

Sp.  Plios.  Bz Spring  phosphor  bronze. 

Sp.  S Spring  steel . 

S .  R Soft  rubber. 

Tobin  Bz Tobin  bronze. 

T.  S Tool  steel. 

V.  F Vulcanized  fiber. 

W.  I Wrought  iron. 


CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917. 


Piece 
mark. 


No. 


Name  of  part. 


Location. 


Material. 


Remarks. 


65L 

308 
13G 

56Q 

56P 
56R 
85B 

85A 

85C 

36C-36D 

36F 
9G3-9H3 

9A 
50K 

lOD 
27A1 
27B1 
57D 
55D 

lOE 
21 D 
45N 
45R 
48K 
50  R 
oOC 
oOG 
50H 
SOL 
51 K 


I  Adjusting  nut,  trav- 

I      ersing. 

]  Adjusting  plug 

Angle    and    bracket 
I      connections. 
I  Balls,    Hess    Bright, 
i      or  equal. 

i  Ball  races,  irmer 

I  Ball  races,  outer 

Ball-thrust  bearing. .. 
! do 

Ball-thrust  bearings. 

Band  bushings , 


4     Band-bushing  nuts. 
1     Base  ring 


Base  ring,  joint  bolt. 
Bearing 


48     Bearings 

1      Hearing  liner 

7     Bearing  liners 

1     Bearing  ring 

11  Bearing-ring  studs. 

96  Bearing  tap  bolts. . 

4  ;  Bolts 

3  ! do 


.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 


On  sleeve . 


F.  S. 


In  recoil  cylinder  head 

Side  angle  to  rear  bracket . . . 


F.  S. 

S.... 


T. 


B". 
B". 


For    ball    race,    inner   and 

outer. 

On  elevating  nut T.  S. 

do T.S.' 

For  traversing  shaft 

For  slow-motion  shaft,  upper 

For  worm  shaft 

On  spring  rod  end,  rear,  at     Bz.  No.  3... 

recoil  band. 

On  band  bushings '  F.  S.  No.  3. 

On  concrete  platform C.S.  No.  2. 


At  joint  on  base  ring 

Supporting    power    pinion 

(52Q). 

For  traversing  rollers 

In  cradle 

....do 

On  elevating  screw  beam — 
In    elevating    screw    beam 

(55A1). 
For  traversing  roller  bearings 
For  trunnion  caps  (21 B-21L ).    S 
For  quick-motion  bracket. . .  j  S 

For  bracket  cover  (45P) i  S 

For  control  cam  (48H) |  S 

For  speed-gear  bracket  (50A)  |  S 

....do I  S 

For  motor  bracket  (50F) S 

....do S 

For  bearing  (50K) |  S 

For  throw-out-gear  support..]  S 


S 

Bz.No.4.. 


Bz.No.3.. 
Tobin  bz  . 
Tobin  bz. . 
F.S.No.3. 
S 


Commercial. 

Do. 

Do. 
2-36  J,  2-36D. 


Front    half,    9G3; 
rear  half,  9H3. 


On  distance  ring. 


Do. 


6594—17- 


18 


CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917— Continued. 


Piece 
mark. 

No. 

Name  of  part .         i 

Location. 

Material. 

Remarks. 

51 N 

6 
4 
2 

2 
2 
4 
6 
5 
6 

8 

2 

2 

8 
12 
24 

4 
28 

2 

4 

4 

4 

4 

2 

1 

1 

2 

1 

2 

12 
12 

4 

4 
68 

8 
36 

8 

4 
6 

4 

18 

24 

36 

4 

6 

18 

18 

2 

2 

4 

4 

6 

4 

4 

2 
2 

i 

3 
2 

2 
2 
4 
2 

4 

4 

5 
2 
2 
1 
2 
2 
6 
8 

Bolts 

For  throw-out  housing 

For  straps  (55K) 

S 

551. 

do 

S 

en  3 

.      do             

F'-r     lower     control  -  shaft 
brae",  et. 

For  slow-motion  case 

do 

S 

671) 

do 

-.  ..do               .... 

S 

67E 

S. 

67S 

do 

For  slow-motion  bracket 

For  lower  gear  case 

S 

67K 

do         

S 

68D 

do 

S 

71C 

do 

For  traversing   crank-shaft 
bracket. 

For  rear  bracket  (14E ) 

At  joint  on  base  ring 

S 

14F 

Bolts,  with  crown  nuts 
Bolts,  with  nuts 

do 

..  ..do         

s 

* 

9B 

s.... 

9C 

s 

9D 

s 

s 

lOB 

do 

do 

At  joints  on  distance  ring. . . 
do 

IOC 

s 

s 

13U 

..  .  do               

For  front  plate  (13S) 

22B 

do 

s 

22C 

do 

do                                

s.  . 

43C 

do 

do 

..do                   .  .   . 

i^or  hand  wheel  bracket  case. 
For  control  bracket  (48D)... 
For  cap  ( 48A) 

s 

48E 

s... 

48B 

s 

53C 
53D 

do 

..    .do               

For  elevating  bracket  (53A1). 
do 

s 

s 

53D 

Belt,  with  nut 

do 

For  elevating-bracket  cover 

(upper)  (53E). 
.     .do 

s 

53  G 

s 

o3H 

Bolts,  with  nuts 

Bolt,  with  nut 

Bolts,  with  nuts 

do 

Bolts,  tap 

:::::do:::::::::::::::: 
do 

do 

do 

s. 

53  K 

.  ..do 

s 

53  L 

do 

s 

IID 

s 

lOG 

For  wrench-hole  cover 

For  wrench-hole  cover,  rear. . 
For  wrench-hole  cover,  front . 

For  elliptical  hole  cover 

For  strap  (12Z) 

s 

12C 

s 

12F 

s 

12H 

s 

12AA 

s 

13D 

do         

Side  plates  to  side  angle 

For  angle  and  bracket  con- 
nection (13H). 

For  front  plate  (13S) 

For   front    brackets    (14A- 
liB^. 
do 

s 

13H 

do 

g 

13W 

.....do 

do 

do 

do 

do 

do 

do 

s 

14C 

s 

14D 

s           

14  K 
14D 

For  column  bracket  (14H) . . . 
do 

s 

s         

14N 

For  column  (14M) 

s 

15M 

s        

15R 

do         

For  ladder  at  rear  of  carriaee . 
For  side  frame,  right  (19Bf).. 

For  side  frame,  left  (20A; 

For  left  elevation  cap  ( 21G ) . . 
For  right  elevation  cap  (21 K) 

s 

19C 

do 

s       

20B 

do 

do 

s 

2111 

s 

s              

21L 

do 

22D 

do 

..  ..do    

s 

22E 

do 

s 

22G 

do 

For  front  clip            

s 

22G 

do 

For  rear  clip 

s           

33R 

do 

do 

do 

Expans^ion      chamber      to 
cradle. 

For  overflow  coupling 

For  pipe  clamp  (33H) 

For  pipe  hook  (33M) 

For  bracket  cover  (45P) 

For  clutch  stop  plate  (46S) . . . 
For  cap  (4S  A.)            

s 

331' 

s 

33  K 

s 

33M 

do... 

do 

s              

45Q 

s 

46T 

.  .  do  

s 

48C 

do                   .     .. 

s 

52L 

do 

For  clutch  fork  bracket 

For  fulcrum  bearing (52F)... 
For  elevating  bracket  (53 .\1) 
For  elevating  bracket  cover 

(upper)  (53E). 
For  elevating  bracket  cover 

(lower)  (53N). 
For  cover  supports  (54N1) 

and  (54P1). 

s       

52G 
53B 

dc 

dc 

s 

s        

53M 

do..                

s 

53r 

do             

s 

54Q 
58D 

do    

s 

..  ..do 

s 

59D 

do 

On  elevating  pointer  bracket 
1  For  worm  housing 

s 

59  F 

do 

do 

do 

do 

do 

do 

s         

65M 
6fiK 

1  For  adjusting  nut,  trav 

!  For  fork  shaft  bearing 

For  slow-motion  bracket  cap. 

s............ 

67  B 

s         .  . 

67P 

s 

68B 

i  For  traversing  bracket 

s 

19 


CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917— Continued. 


Piece 
mark. 


68F 
A66F 
A66G 

66L 

15E-15F 
15G-15H 
45P 
57A 
57G 
57F 
57P 
57M 
55B 


29A 
35D 
44G 

67F 
67G 
21N 

21F 

48A 
21R 

A66IT 
30E 
22L 
66  B 
52K 

66C 

46R 

46P 

46S 

68M 
64B 
64C 
64E 
64F 
64K 
65  B 
66D 
66E 
67L 
33A 
44D 
55F 


68L 
67M 
14M 
14H 

13E-13F 

13N-13P 

13^ 

46E 

46D 
48D 
48H 

48P1 

48L 
60K2 


No. 


Name  of  part. 


Bolts,  tap 

do 

do-... 

Bolts,     countersunk 
head. 

Braces .• 

Brace  angles 

Bracket  cover , 

Buffer  cylinder 

Buffer  cylinder  head. 

Buffer  piston 

Buffer  spring 

Buffer  yoke. .' 

Buffer  yoke  studs 


1     Bushing. 


1  i do 

4  I do 

1    do 


1  ! do 

1  ' do 

20     Bushing  screws. 


20  I  Bushing  screws  (large) 

1  Cap 

2  I  Cap  eyebolts 


2     Clamps 

2     Clamp  screws 

2     Clip  eyeholts 

1  '  Chitchfork 

1     Clutch-fork  bracket. . . 


1     Clutch-fork  shaft. 


Clutch  spring 

Clutch-spring  collar. 
Clutch  stop  plate . . . 


Collar  (large) . 
do 

Collar  (small). 

Collar  (large) . 

Collar  (small). 

Collars 

Collar 

Collar  (large) . 

Collar  (small). 

1  I do 

6     Collars 

1  !  Collar 

3  I  Collar  screws . 


Collar  set  screw  (large) 

Collar  set  screw 

Columns 

Column  brackets 


Connection  angle  to 
side  frame. 

Connection  angles  to 

side  plate. 
Connection  angle  to 

transom. 
Connecting  rod  (lower) 

Connecting  rod(upper) 

Control  bracket 

Control  cam 


Control 


Control  gear  clutch . 
Control  gear  pinion. 


Location. 


For  handhole  cover 

For  shoulder  rest 

....do 

For  fulcrum  bearing 


For  auxiliary  platform 

do 

For  quick-motion  bracket. . . 

In  buffer  yoke 

In  buffer  cylinder 

....do...; 


.do. 


On  elevating  screw  beam 

For  buffer  yoke  to  elevating 

screw  beam. 
For  shaft  bearing  in  side 

frame  (left  20A)  near  speed 

indicator. 

In  recoil  cylinder 

In  spring  cylinder  head  (rear) 
In  horizontal  intermediate 

pinion  (44H). 

In  slow-motion  case 

do 


For  elevating  cap  bushings 

(21M). 
For  trunnion  bushings(21  E ) . 
For  control  bracket  (48D).., 
For  trunnion  caps  21 B  and 

21C. 

For  shoulder  rest 

In  rear  piston-rod  nut 

For  front  and  rear  clips 

For  traversing  clutch 

Attached  to  lower  part  of 

elevating  bracket. 
Through  side  frame  (left)  to 

traversing  bracket. 
On     vertical    shaft    lower 

above  quick-motion  clutch. 
On     vertical    shaft     lower 

above  clutch  spring. 
On  side  frame  for  operating 

lever  (46Q). 

On  traversing  shaft 

For  traversing  shaft 

do 

For  handwheel  shaft 

....do 

For  crank  shaft 

For  worm  shaft 

For  clutch  fork  shaft 

....do 


On  slow-motion  shaft  (lower) 

On  ends  of  expansion  pipes. 

For  vertical  .shaft  (lower)... 

For  screw  collar  (upper) 
(55G)  and  screw  collar 
(lower)  (55H). 

For  collar  (large) 

In  collar 

Supporting  platform 

From  column  (14M)  sup- 
porting platform. 

On  inner  edge  of  side  plate. 


For  front  plate  (13S). 
....do 


On  le't  side  of  carriage  for 

elevating  Q.  M.  shipper. 
do 

On  side  frame  (left) 

On  upper  control  shaft  at 
elevating  bracket. 

In  control  bracket  at  junc- 
tion of  control  shafts. 

On    ertical  shaft  (lower). . . 

Near  hydraulic  elevating 
speed  gear. 


Material. 


S 

s 

s 

s 

s 

s 

c  s 

f'.  s".  No.'i" 
Bz.  No.  3... 
F.  S.  No.  3.. 

Sp.S 

C.  S.  No.  3.. 
S 

Bz 


Bz.  No.  4. . . 
Bz.  No.  2... 
Bz.  No.  3... 

Bz.  No.  3... 
Bz.  No.  3... 
TobinBz... 

TobinBz... 
Bz.  No.  3.... 
S 

c.s 

s 

s 

c.s.  No.  2.. 
C.S 

s 

Sp.  Phos.  Bz, 

F.S.No.3.. 

Bz.  No.  3... 

Bz 

Bz 

Bz 

S 

S 

S 

Bz 

Bz 

Bz 

Bz 

F.  S 

S 

F.S 

S 

S 

C.S.No.3... 
C.S 

s 

s 

s 

s 

s 

Bz.No.3.... 
F.S.No.3... 

F.S.No.3... 

F.S.No.3... 
F.S.No.3... 


Remarks. 


For  traversing  case. 


0.25  by  0.25  by  0.5 
angle. 

Right    (13N),   left 
(13P). 


20 


CAERIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917— Continued. 


Piece 
mark. 

No. 

-    48F 

1 

60F 

52A1 

52B1 

15K 

36E 

36B 

36A 

A66DA 

33F 

46N 

52N1 

50M 

50E 
SOD 

12T 
^12U 

12W 
67N 
12K 

54N1\ 
54P1/ 

2601 

A66EA 
45C1 
64L2 
64H1 
45B1 
57K 
30M1 

29B 

35E 

26A 
H23W 

77N 
58M 
58N 
lOA 

21P 
9F 

A66A 

53A1 

60A 

60B 

60C 

1 

53E 

53N 

77B 
21T 

21U 

H23Z 

Name  of  part. 


Location. 


MateriaL 


Remarks. 


Control  lock 

Control  shaft  bushing 

Control  sleeve 

Control  sleeve  clutch. 

Corner  clips 

Counter  recoil  springs 

(inner). 
Counter  recoil  springs 

(intermediate). 
Counter  recoil  springs 

(outer). 
Couplings 

Coupling 

do 

do 

Coupling  disk 


Coupling,  motor  end. . 
Coupling,  speed-gear 
end. 

Cover  handles 

Cover-handle  fasten- 

Cover-handle  plates . . 

Cover  plate 

Cover  screws 

Cover  support 

Cradle 

Crank  fastening 

Crank  gear 

Crank  pinions 

Crank  shafts. 

Crankshaft 

Cylinder  caps 

Cylinder-head   bush- 
ing. 
Cylinder-head  studs . . 

Cylinder-head  screws. 

Cylinder-strap  studs. . 
Depressing  direction 
plate. 

Direction  plates 

Disk  rope 

Disk  weight 

Distance  ring 

Dowel  pins 

Dowel  pin 

Dowel  pins 

Drainpipes 

Drain  plug 

Elevating  bracket  — 
Elevating  bracket 

bushing  (upper;. 
Elevating  bracket 

bushing  (intermedi- 
ate). 
Elevating  bracket 

bushing  (lower). 
Elevating  bracket 

cover  (upper). 
Elevating  bracket 

cover  (lower). 

Elevating  crank 

Elevating  crank  hook 

(lower). 
Elevating  crank  hook 

(upper). 
Elevating     direction 

plate. 


Running   in    control   cam     F. S.No.3.. 
speed  control  details.  j 

In  elevating  bracket 

On  vertical  shaft  (lower) 

On  control  sleeve 

For  auxiliary  platform 

In  spring  cylinders  (35A1) . . 


Bz.No.3.. 
Bz.No.3.. 
F.S.No.3. 


.do. 


-do. 


For  expansion  pipes,  upper 
and  lower. 

On  ends  of  expansion  pipes . . 

Coupling  connecting  rods, 
upper  and  lower  together. 

On  lower  end  of  vertical 
power  shaft  (52H1). 

Betweencouplings  on  motor 
shaft  and  hydraulic  speed- 
gear  shaft. 

On  motor  shaft 

On    hydraulic    speed-gear  I 
shaft. 

One  over-handle  plate  ( 12W ) 

do 


Sp.S. 
Sp.S. 
Sp.S. 
F.S.. 


F.S. 
F.S. 


F.S.No.3. 
Bz.No.4.. 


C.S.No.3. 
C.S.No.3. 


To  roller  cover  ( 12X1) 

For  lower  gear  case 

For  roller  cover  to  racer 

Attached  to  elevating 
bracketsupporting  throw- 
out-gear  cover. 

On  trunnions  between  side 
frames. 

For  cranks 

For  crank  shaft  (45B1) 

On  crank  shafts 

In  side  frames 

For  elevating  quick  motion. . 

On  buffer  cylinder 

In  recoil  cylinder  head 


F.S. 
S.... 


S... 
C.S. 

S.... 


Cylinder  head  to  recoil  cy- 
linder. 

Attaching  cylinder  heads  to 
spring  cylinder. 

In  cradle  for  cylinder  straps. . 

On  elevating  hand  wheel 


On  side  frames 

On  range-disk  gear 

On  disk  rope 

Between  racer  and  base  ring, 

supported    by    traveling 

rollers. 

For  side  frames 

In  recoil  cylinder 

For  slow-motion  bracket  — 
In  base  ring  under  roller 

path. 

In  overflowing  coupling 

On  side  frame,  left 

In  elevating  bracket 


.do. 


.do. 


For  elevating  bracket  (53A1) 
do 


On  crank  shaft 

For  hanging  elevating  crank 

on  side  frame. 
do 


On  elevating  handwheel. 


Fl.S. 
S..., 


0.25  thick. 
0.375  thick. 


Right  (54N1),  left 
(54P1). 


Bz.No.4.. 
F.S.No.3. 
F.S 

F.S....'.-. 
Bz.No.3.. 
Bz.No.4.. 

F.S.No.3. 


Complete. 


S.. 
Bz. 


Bz.. 
G.I. 
C.I- 
C.S. 


Sash  cord. 

In  six  sections. 


W.I. 


F.S 

C.S : 

Bz.  No.  3. 

Bz.  No.  3. 


Bz.  No.  3. 

C.S 

C.S 


In  two  parts. 
In  halves. 

Do. 


Do. 


F.S. 
S.... 


21 


CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917— Continued. 


Piece 
mark. 


77A1 
.■iGA 

57C1 
56S 
56T 

44L1 

55C 
55M 

55E1 

55  A 1 

56N 
21M 

59H 
59C 

59A 

12G 
33Q 

33S 

33D 

33E 

33C1 

A66D 
34C 
30P 
33a 
57N 
52D 

76M 
66H 
6oQ 
13M 

14A-14B 

22F 

•      30H 
13S 

22A1 

52F 

66G 

12BA 

30T 

30L1 

33T 

33B 
34  D 
34E 
STB 
57L 

65E 
56W 
57E 
67Q 
52P1 

68E 
46L 
46H 
A69P 
43D 
43A 

43B 


No.  I         Name  of  part. 


Elevating  handwheel 
Elevating  nut , 

Elevating  nut  collar. , 
Elevating  nut  cover . . 
Elevating  nut  gear.... 
Elevating  nut  pinion. 


Elevating  pin 

Elevating  pin  nuts. . 


Elevating  screw 

Elevating  screw  beam 

Elevating  screw  wiper 

Elevation  cap  bush- 
ings. 

Elevation  pointer 

Elevation  pointer 
bracket. 

Elevation  pointer 
worm. 

Elliptical  hole  covers. . 

Expansion  chamber. 

Expansion  chamber 
head. 

Expansion  pipe  (up- 
per). 

Expansion  pipe  (in- 
termediate). 

Expansion  pipe 
(lower). 

Filling  valve  cap 

Filling  valve  plug 

Follower 

....do 

....do 

Fork  connecting  rod . 


Fork  end 

Fork  shaft  bearing. 

Friction  spring 

Front  angle 


Front  brackets . 
Front  clip 


Front  piston  rod  nut 
Front  plate 


Front  transom... 
Fulcrum  bearing . 


do... 

Gasl^ets. 

do... 

do... 

do... 


....do 

do 

do 

do 

do 

do 

Gear  disk 

Gear  set  screws . 

Glands 

Half  bushings . . 
Hand  clutch 


Handhole  cover 

Handle 

Handle  spring 

Handwheel 

Handwheel  bracket... 
Handwheel    bracket 

bolts. 
Handwheel    bracket 


Location. 


On  handwheel  shaft 

In  elevating  screw  beam. 

On  elevating  nut 

do 

....do 


In  elevating  nut  on  end  of 
horizontal  shaft. 

Between  straps  (55K) 

On  outside  of  straps  on  ele- 
vating screw. 

Through  elevating  screw 
beam  (55A1). 

Between  side  frames  in  bear- 
ings. 

In  top  of  elevating  nut 

For  elevating  screw  beam 
bearing. 

On  elevation  pointer  bracket 

On  side  frame,  left 

In  worm  housing 

On  inside  of  racer 

On  top  of  cradle 

On  end  of  expansion  cham- 
ber. 

From  expansion  chamber  to 
overflow  coupling. 

From  overflow  coupling  to 
expansion  pipe  (lower). 

From  expansion  pipe  inter- 
mediate to  recoil  cylinder. 

On  valve  body 

In  valve  body  (34B) 

On  rear  end  of  recoil  cylinder 

On  ends  of  expansion  pipes. . 

In  buffer  cylinder  heads 

Power  shipper  from  plat- 
form. 

On  reach  rods 

On  side  frame  (left) 

For  sleeve 

Under  outer  edges  of  front 
and  side  plates. 

On  front  of  carriage  sup- 
porting platform  plate. 

On  racer  engaging  under  lip 
on  base  ring. 

On  piston  rod  near  gim  lug. . 

For  platform  on  front  of 
carriage. 

At  front  of  carriage  between 
side  frames. 

On  under  side  of  platform 
flange  on  side  frame  (left) 

Under  side  plate  (left) 

Under  roller  cover  (12  x  1) . . 

For  adjusting  plug  (308) 

Under  recoil  cylinder  head . . 

Under  expansion  chamber 
head. 

On  ends  of  expansion  pipes. . 

For  valve  body  (34  B ) 

do 

For  buffer  cylinder 

For  cylinder  cap 

For  hand  hole  cover 

For  worm  gear 

For  elevating  nut  gear 

In  buffer  cylinder  head 

For  slow  motion  bracket 

In  control  sleeve  over  verti- 
cal power  shaft. 

For  traversing  case 

On  operating  lever  (46Q) 

For  handle  (46L) 

On  handwheel  shaft 

Attached  to  side  frame  (left). 

Handwheel  bracket  case  to 
side  frame,  left. 

Attached  to  side  frame,  left. . 


Material. 


C.S 

Bz.  No.  4.... 
F.  S.  No.  3.. 

Sh.  Bz 

F.  S.  No.3.. 
Bz.  No.  3.... 

T.  S.  "B".. 
Bz.  No.  3.... 

F.  S.  No.  3.. 

C.  S.  No.3.. 

Bz.  No.  4.... 
Bz.  No.  4.... 

Bz.  No.  4.... 

C.S.  No.  3.. 

F.  S.  No.3.. 

S 

C.S 


Remarks. 


Seamless  S. 

tubing. 
Seamless  S. 

tubing. 
Seamless  S. 

tubing. 

Bz 

TobinBz.. 
Bz.  No.  2... 

F.  S 

F.  S.  No.  3. 
S 

C.S.  No.  2. 

Bz 

Sp.  S 

s 

C.S 

C.S.  No.3. 

F.  S.  No.  3. 
S 

C.S.  No.  3. 

C.S.  No.  2. 

C.S.  No.  2. 

R 

Ann.  C 

Ann.  C 

V.F 

V.F 

C 

S 

c 

c 

R 

Bz.  No.  4... 

S 

Bz.  No.  3... 

Bz 

F.  S.  No.3. 

Fl.S , 

Bz 

Sp.Phos.Bz 

Bz 

C.S.  No.  3. 
S 

C.S.  No.  3.. 


0.25  thick. 


22 

CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917— Continued. 


Piece 
mark. 


44P1 

64  G 
64D1 
44M 

44F1 


44E1 

51D1 

60N1 

60P1 

58K 

58L 

51F 

54F 

54C 
54D 
54G 

54A 

54B 

54K 

60D 

60E 

54L 

21 S 


27K 

A65A 

15P-15Q 

15N 
21G 

46F 

9K 
12A 

27D 
27C 
60H 

48N1 

60L2 

67H 
50F 
44C 


26B 
29C 


No. 


Name  of  part. 


Hand  wheel  gear 

Handwheel  pinion 

Handwheel  shaft 

do 

Horizontal    interme- 
diate gear. 

Horizontal  shaft 


Idler. 


Idler  bracket 

Idler  bracket  bolts 

Idler  sheave 

Idler  sheave  pin 

Idler  fulcrum 


Indicator. 


Indicator  collar, 
do. 


Indicator  pointer 

Indicator  shaft  (up- 
per). 
Indicator  shaft  (lower) 

Indicator  shaft  (inter- 
mediate). 

Indicator  shaft  bush- 
mg  (lower). 

Indicator  shaft  bush- 
ing (upper). 

Indicator  shaft  coup- 
lings. 


Keys.. 

do. 

....do. 


....do 

....do 

....do 

-...do 

....do 

....do 


....do 

....do 

....do 


Keyway  filling  piece . 

Knob 

Ladder  sides 


Ladder  steps 

Left  elevation  cap . 

Lever  fulcrum  pin. 


Leveling  screw. 
Liner 


Line  screws 

Locking  screws 

Lower  control  bracket 
Lower  control  shaft. . . 

Lower  control  shaft 
pinion. 

Lower  gear  case 

Motor  bracket 

Nut 

do 


Location. 


On  upper  end  of  vertical 
shaft  upper. 

On  handwheel  shaft 

In  slow-motion  bracket 

In  handwheel  bracket  case 
(43B). 

On  horizontal  shaft  engaging 
with  vertical  intermediate 
pinion  (44H). 

On  elevating  slow- motion 
S3'stem. 

Between  throw-out  gear  and 
throw-out  pinion. 

On  elevating  bracket 

For  idler  bracket 

On  idler  sheave  pin 

In  side  frame,  left 

In  idler  bracket  (60N1)  sup- 
porting idler. 

On  top  of  indicator  shaft 
(upper). 

On  top  of  indicator  (54F) 

Under  indicator  gear  (54E ) . . 

On  boss  on  side  frame  under 
indicator. 

Through  bearing  in  left  side 
frame. 

To  indicator  gear  in  elevat- 
ing bracket. 

Between  indicator  shafts 
upper  and  lower. 

In  elevating  bracket 

do 

Coupling  indicator  shafts, 
upper  and  lower  to  indi- 
cator shaft  intermediate. 

For  side  frames 

For  spring  cylinder 

For  vertical  shafts  upper 
and  lower. 

For  horizontal  shaft  (44E1),. 

For  crank  shaft 

For  quick-motion  shaft 

For  vertical  power  shaft 

For  hand  clutch 

For  indicator  shaft  interme- 
diate. 

For  indicator  shaft  (upper) . . 

For  indicator  shaft  (lower). . . 

For  elevating  nut  gear 

For  spring  cylinderstrap 

For  handle 

For  ladder  at  rear  of  carriage . 

For  ladder  at  rear  of  carriage . 
For  elevating  screw  beam 

bearing. 
In  side  frame  for  operating 

lever. 

In  base  ring 

On  racer 

For  bearing  liners  in  cradle. . . 

For  strap  tap  bolts  (27E) 

On  speed  gear  bracket 

From  control  bracket  to  hy- 
draulic speed  gear. 
On  lower  control  shaft 

On  side  frame  (left) 

To  bottom  of  side  frame,  left. 

For  vertical  shaft  (upper) 

For  bearing  ring  stud  (o5D) . . 

For  bolts 

For  shoulder  rest 

For  roller  pins 

For  rear  bracket  stud  (19A) . . 

For  cylinder  strap  stud 

For  cvlinder  head  stud  (29B) 


Material. 

Remarks. 

F.S.  No.  3.. 

F.S.  No.  3.. 
F.  S.  No.  1.. 
F.S.No.3.. 

Bz.No.3... 

F.  S.No.  1.. 

F.S.  No.  3.. 

Bz.No.3.... 
S 

CI 

F.S.  No.  3.. 
Bz.  No.  4... 

Bz 

S 

Without  keyway. 
With  keyway. 

S   

Bz 

F.S 

F.S 

F.S 

Bz.No.3... 

Bz.No.3... 

F.S 

F.S 

S 

s  

0.437  by  0.312. 

0.437  square. 
0.5  square. 
0.437  square. 
0.437  square. 
0.437  by  0.312. 
0.25  square. 

0.25  square. 
0.25  square. 
0.5  by  1. 

s 

s 

s 

s 

s 

s 

s 

s 

s 

Bz 

Bz 

For  handwheel. 

s 

Right  (15P),  Left 
(l.-^Q). 

s 

C.S.No.2... 

F.S.  No.  3... 

S 

Washer  head. 

Bz 

Tobin  Bz... 
Tobin  Bz... 
Bz.No.3.... 

F.S.  No.3.. 

venient. 

Bz.No.3.... 

C.S 

C.  S.No.  3... 
F.S. 

Special. 

S 

S      - 

ing. 

S 

s 

s 

s     . 

Special. 
Do. 

s 

23 


CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917— Continued . 


Piece 
mark. 


44N 


21Q 


A66M 
12K 
12P 

12Q 
12R 

12S 


46Q 


33N 
30R 
57H 


No. 


Name  of  part . 


Location. 


Material. 


Nut,  crown. . 
Nuts,  crown. 

....do 

do 


Nut,  crown.. 
Nuts,  crown. 
Nut,  crown.. 
Nuts,  crown. 

do 

do 

do 

do : 

do 

Nut,  crown.. 


-do. 


Nuts,  crown. 

do 

Nut,  crown.. 
Nuts,  crown. 
Nut,  crown.. 
Nuts,  crown. 
Nut,  crown.. 
Nuts,  crown. 
Nut,  crown.. 


do 

Nuts,  crown. 


Nuts,  special... 
Nuts,  standard. 

do , 

Nut  strips 

Oil-hole  screws. 
Oil  pipes 


For  handwheel  shaft  (44M) . . 
For  quick  motion  shaft  (45E) 

For  bolts  (45N) 

For  bolts  (45R) 

For  lever  fulcrum  pin 

Foi'  upper  control  shaft 

For  lower  control  shaft 

For  bolts  (48K) 

For  bolts  (50B) 

For  bolts  (50C) 

For  bolts  (50G) 

For  bolts  (SOL) 

Forbolts(51N) 

For  indicator  shaft  (upper) 

(54A). 
For  indicator  shaft  (lower) 

(54B). 
For  buffer  yoke  stud  (55B).. 

For  bolts  (55L) 

For  elevation  pointer  worm. . 

On  buffer  piston 

For  range  disk  fulcrum 

For  traversing  shaft 

For  handwheel  shaft 

For  crank  shaft 

For     slow  -  motion     shaft 

(lower). 

For  worm  shaft 

For  traversing   crank  shaft 

bracket. 

Epr  dowel  pin  (21P) 

For  base  rine  joint  bolt  (9A) . 
For  racer  joint  bolt  (llA) — 

For  shoulder  rest 

For  oil  holes  in  racer 

In  racer 


S... 
Bz. 


.do. 
.do. 
.do. 


Oil  plugs. 

do 

.....do.... 
do... 


Oil  plug.. 
Oil  plugs. 
Oil  plug.. 
....do... 
Oil  plugs. 

do... 

Oil  plug.. 

do... 

-...do... 
Oil  plugs . 

Oil  plug . . 

Oil  plugs . 


....do... 

Oil  plug. 
do... 

....do... 
do... 


Oil  plugs . 
Oil  plug., 
Oil  plugs. 


do 

Operating  lever 


Overflow  coupling. 
Packing  rings 


.do. 


Pins. 

do 

do 


!  In  elevating  bracket  cover 
(upper)  (53E). 

In  racer 

.    Side  frame,  ri-rht  (19B1) 

■  '  Side  frame,  left  (20A)  

For  trunnion  caps  21B  and 
21C. 

For  right  elevation  cap  (21 K) 
.    For  handwheel  bracket  case. 

.    For  handwheel  bracket 

.    For  quick  motion  bracket — 

.    For  bracket  oover  (45 P) 

.    Forcap(48A) 

•    For  bearinc  (oOK) 

.    Forthro\^ou  gear(51El) 

.    For  idler  talerum  (51F) 

.  For  elevating  bracket  cover 
I      (upper)  (53E). 

■  i  For  elevating  bracket  cover 

(lower)  (5.3N). 
For  elevating  s:rew  beam 

(ooAl). 

On  elevating  nut 

On  traversing  gear 

For  slow  motion  bracket  cap. 

For  lower  gear  case 

For  collar  f small) 

For  traversing  case 

For  collar  (large) 

For  traversing  crank  shaft 

bracket. 

For  spring  stirrups Bz 

At  top  end  of  connecting  rodi  C 

(upper),  Q.  M.  shipper  de 

tails. 

To  pipe  on  side  of  cradle i  Bz.  No.  2 

At  rear  end  of  recoil  cylinder.  I  G.  W.  H.  P . 

For  buffer  cylinder  head i  G.  W.  H.  P 

For  cylinder  strap  studs j  S 

For  cylinder  head  bushing. . .    Bz.  No.  4 
For   "control    sleeve    clutch!  Bz 

(52B).  i 


Br. 


Remarks. 


Special. 


With  split  pins. 


Seamless 

tube. 

Do. 

Do. 

Do. 


drawn 


24 


CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917— Continued . 


Piece 
mark. 


No. 


Name  of  part. 


Location. 


Material. 


Remarks. 


46U 
46G 


68N 
76G 
76H 
76N 
64  Ml 
33H 

33L 

•30A 

30B1 

13R 

9E 

46M 
56M 
56L 
52C1 
52M 


52R 
52Q1 

45M 

45H 

46  A 1 

46B 

45G1 


45E1 


45F1 

llBl- 
llCl 
llA 
oSBl 
58E1 
58A1 
58  1 
58G1 
76K 
76L 
14E 

19A 
22H 

30G 

29D 

30K1 

27F 

21 K 


66F 
52E 
76D 
85Q 

85S 

85F 

85H 

85   A 


Pins For  hand  clutch  (52P) 

do For  zero  strip  (59G). 

do For  worm 

do For  zero  strips  (59K). 

do I  For  elevating  bracket  bush- 
ings. 

Pin  (type  A) For  quick-motion  fork 

do For  connecting  rod,  lower. . . 

Pins  (type  A) For  power  clutch  fork 

Pin  (type  A) For  rod  end  (52E) 

.do For  worm  bearing  lock 

Pins  (type  A) For  treadle  bars 

.do do 

.do For  fork  ends 

Pinion  collars On  crank  shafts 

Pipe  clamps For    attaching    expansion 

pipes. 

Pipe  hook do 

Pipe  plugs For  expansion  chamber  33Q. 

Piston On  piston  rod 

Piston  rod In  recoil  cylinder 

Plate  reinforce For  front  plate  (13S) 

Plugs In  outer  flange  on  base  ring  . . 


For  handle  (46L) 

On  plunger  stud 

In  elevating  nut 

On  vertical"  power  shaft 

Operattag  power  clutch  and 

attached   to   clutch   fork 

bracket. 
For  "  B  "  end  of  speed  gear. . 
Coupled  to  end  of  vertical 

power  shaft  by  coupling 

(52N). 

On  side  frame,  left 

On  vertical  shaft,  lower 

-..-do 


Plunger 

Plunger  nuts 

Plunger  stud 

Power  clutch 

Power-clutch  forks . . 


Power  gear... 
Power  pinion. 


Quick-motion  bracket. 
Quick-motion  clutch. . 
----do 

•Quick-motion  fork 


Quick-motion    lower 
gear. 

Quick-motion  shaft . . . 


Quick-motion   upper 

gear. 
Racer 


Quick-motion  shipper  de- 
tails. 

Lower  end  of  quick-motion 
shaft  in  quick-motion 
bracket. 

On  quick-motion  elevating 
system  from  quick-motion 
bracket  to  elevating 
bracket. 

Upper  end  of  quick -motion 
shaft  in  elevating  bracket. 

On  traversing  rollers , 


Racer  joint  bolts !  At  joint  on  racer 

Range  disk j  On  range  disk  fulcrum . 

Range  di.ik  fulcrum. . . '  In  side  frame  (left) 

Range  dis'v  gear 1  On  range  disk 

Range  di.sk  rack ]  On  cradle 

Range  scale j  On  range  di.5k 

Reach  rods f  For  clutch  mechanism . 


Bz.. 
G.  S. 

S.... 
G.  S. 
Bz.. 


S 

S 

s 

C.S.No.2. 

S 

s 

s 

s 

Bz.  No.  3., 
F.S 


F.S 

C.I 

Bz.  No.  4. 

F.  S."C". 


Bz 

S 

s 

F.  S.  No.3- 
C.S 


Bz.  No.  3.. 
F.S.  No.  3. 


C  S 

f".  s".'No."3! 
Bz.  No.  4.. 
C.  S.  No.2. 


F.S.  No.  3. 
F.S.  No.  3. 


Bz.  No.  4... 

C.  S.  No.2. 


(\ 

S. 

No. 

3.. 

F. 

S 

No. 

3.- 

Bz.  No.  ^ 

■'' 

s. 

No. 

3.. 

G 

s 

R. 

Rear  bracket . 


Rear  bracket  stud. 
Rear  clip 


Rear  piston  rod  nut . . 

Recoil  cylinder 

Recoil  cylinder  head.- 
Recoil  cylinder  strap. . 

Right  elevation  cap-  - . 

Rivets 

Rivets  0.75 

Rivets  0.625 


Rivets 

Rocking  le\  er . . 

Rod  end 

Rollers 

Roller  ])earing . . 
Roller  bearings. 
Roller  bearing . . 

do 

..-.do 


Supporting  platform  at  rear 

of  carriage. 
Rear  brae"  et  to  siie  frame. . 
On  racer  engaging  under  lip 

on  base  ring. 
On  piston  rod  near  gun  lug. . 

Supported  under  cradle 

On  front  end  of  recoil  cylinder 
On  cradle  supporting  recoil 

c-ylinder. 
For  elevating  screw  beam.. 

For  liner  12A 

For  side  plates  to  angles 

For  side  and  front  plates  to 

angles. 

For  bushing  (35D) 

On  clutch  fork  shaft 

On  fork  connecting  rod  (52D) 

On  roller  pins 

For  vertical  shaft  (lower) 

For  horizontal  shaft 

For  handwheel  shaft  (44M).. 

do 

For  crank  shaft  (45B1) 


C.  S.  No.  3. 


C.S.  No.  3. 

F.S.  No.  3. 
C.S.  No.  3. 
C.S.  No.  3. 
C.S.  No.  3. 

C.  S.  No.  2. 

Bz 

S 

S 


Bz 

C.  S.  No.  2. 
C.S.  No.  2. 
Bz 


Driven. 


A=1.18. 
A=2.175. 

A =1.8. 
A=1.5. 


Inserted  after  drain 
pipe  is  in. 


Front  half  (llBl); 
rear  half  (llCl). 


In  4  parts. 
76K  elev. 
76L  trav. 


Commercial. 
Do. 
Do. 
Do. 
Do. 


CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF   1917— Continued. 


Piece 
mark. 

No. 

85GA 

1 

85U 

2 

85EA 

1 

85KA 

2 

85N 

2 

85X 

2 

85T. 

2 

85AA 

3 

45D 

2 

12x1 

2 

76E 

8 

13C 

52 

13C 

15L 

14 

55G 

55H 

27L 

56B 

56F 

58H1 

32 

77P 

6 

A69N 

3 

H23U 

4 

56U 

8 

2 

12N 

8 

30F 

5 

60M 

1 

71A 

1 

13K-13L 

2 

13A-13B 

2 

20A 

19B1 

65N 

65F 

65P 

I 

65R 

67R 

67A 

67C 

64S1 

64R 

64N 

64Q 

64P1 

50A 

A65B 

35A2 

27G-27M 

27H-27N 

27P 

Name  of  part. 


Location, 


Material. 


Remarks. 


Roller  bearing 

Roller  bearings 

Roller  bearing 

Roller  bearings 

....do 

....do 

...do .• 

....do 

Roller-bearing  sleeves 

Roller  covers 


Roller  pins. 

Screws 

....do 

....do 

....do 


For  crank  shaft  (45B1) i. 

For  quick-motion  shaft  (4oE)| . 

For  traversing  shaft I . 

do 

do 

do 

For  slow-motion  shaft 

For  worm  shaft 

In  quick-motion  bracket  and 

bracket  cover.                      | 
At   opening  in   racer   near  i  S 

joints.  I 

In  clutch  forks S 

Side  plates  to  front  angle Tobin  Bz. 

For  front  plate Tobin  Bz . 

For  auxiliary  platform Tobin  Bz. 


F.  S.  No.  3. 


Screw  collar,  upper. . . 

Screw  collar,  lower . . . 

Screw,     countersunk 
head. 

..-.do 

....do 

....do 

....do 

..-.do 

....do 


Bz. 
F.  S. 


F.  S.  "O". 


Bz. 


Screws,  fillister  head 

Screws,  headless 

Screw  plugs 

Set  screws 

Set  screw 


Shoulder  rest  support . 
Side  angles 


Side  plates . 


For  indicator  pointer  (54G) . 
On  upper  end  of  elevating 

screw  (55E1). 
On  lower  end  of  elevating 

screw  (55E1). 
For  key-way  filling  piece 


For  elevating  nut  (56A) I  S 

For  wiper  key  (56E) Bz 

For  range  scale G.  S 

For  dire?tion  plates Bz 

do !  Bz 

do I  Bz 

For  elevating  nut  cover !  Bz 

For  piston  rod ;  S 

Oil  holes  in  racer i  S 

For  recoil  cylinder  details S 

For  lower  control  shaft  pin-  |  S 

ion.  j 

In  trunnion  cap !  F.  S.  No. 

Under   outer  edge   of  side     S 

plate. 
Platform  on  sides  of  carriage .   S 


Commercial. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 


0.375  thick. 


Casehardened. 
Do. 


Side  frame,  left 

Side  frame,  right 

Sleeve 

Sleeve  disks 

Sleeve  liner , 

Sleeve  plate 

Slow-motion  bracket. . 
Slow-motion  -  bracket 

cap. 
Slow-motion  case 


On  racer C.  S.  No.  3. 

....do C.  S.No.  3. 

On  traversing  shaft ^  F.  S 

For  sleeve '  S 

In  sleeve j  Bz.  No.  4 . . 

For  sleeve F.  S 

Onside frame  (left) j  C.  S 

On  slow-motion  bracket C.  S 


Cup  point. 


Right    (13K),   left 

(13L). 
Right    (13A),    left 

(13B). 


Slow-motion  gear 

Slow-motion  pinion... 
Slow-motion    shaft 

coupling. 
Slow-motion    shaft 

(lower). 
Sloiv-motion    shaft 

(upper). 
Speed-gear  bracket . . . 


Spindle.. 
Split  pin. 


Cn  slow-motion  bracket !  C.  S 

Cn  slow-motion  shaft  (up-     Bz.  No.  3... 

per).                                    I 
On  slow-motion  shaft  (lower)   F.  S.  No.  1. 
For  slow-motion  shafts F.  S 


Split  pins 

Split  pin 

do 

Split  pins 

do 

Spring-cylinders . 


Spring-cylinder  straps 
do i 


-do. 


From  coupling  to  lower  gear    S 

case. 
From  slow-motion  bracket     S 

to  coupling. 

Attached  to  bottom  of  side  '  C.  S.  No.  3; 

frame  (left). 

For  handle '  S 

For  hori'.ontal  intermediate    S 

gear  (44F1).                          i 
For   elevating   nut   pinion     S 

(44L1). 

For  rod  end  (52E) C.  S.  No.  2. 

For  spring-rod  nuts S 

For  clutch-fork  shaft S 

For  worm-bearing  lock S 

For  fork  ends S 

For  traversing  crank S 

On    cradle  .  supported    by     C.  S 

straps. 

On  cradle  for  supporting  C.  S,  No.  2. 

spring  cylinder. 

do C. 

On  cradle   for   supporting  C. 

spring. 


For  handwheel. 


S.  No.  2. 
S.No.  2. 


With  key  way. 

Without  keyway. 

Without    keyway 

or  drilled  hole. 


26 


CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE  MODEL  OF  1917— Continued. 


Piece 
mark. 


3oBl 

35C 

76A 
36  K 

36H 

36Q1 
36P 
36  G 
36N 
36L 

36M 

76B 
59  B 
46  K 
56C 
56G 
56  K 

56  D 
12Z 
55K 


27E 
30Q 


olBl 
51E1 


51G 
JlMl 


olHl 
lOH 
51L 

51 A 


51C 
15C-15D 

68A 
68J 
66A 
77E1 
71 B 

64U1 


No. 


Name  of  part. 


Spring-cylinder  head  s 

(front) 
Spring-cj'linder  heads 

(rear). 

Spring  plungers 

Spring-rod  ends  (front) 

Spring-rod  ends  (rear) 

Spring  rods  (lower). . . 

Spring-rod  nuts 

Spring-rod  pistons 

Spring  rods  (upper) . . 
Spring  separators 


12  Spring-separator 
bushings. 

2  Spring  stirrups 

1  Spring  washer 

1  Stem 

2  Stop  pltmgers 

2  Stop-plunger  keys 

2  Stop-plunger  pins 


Stop-plunger  rollers. 

Straps 

....do 


Strap  tap  bolts 

Stuffing-box  gland. 

Taper  pin 

do 

Taper  pins 


Taper  pin. . 

do 

....do 

....do 

Taper  pins. 


Lor-ation. 


For  spring  cylinders.. 

On  spring  cylinders . . . 


In  spring  stirrups 

Cn  front  end  of  spring  rods 

(lower). 
Cn  rear  end  of  spring  rods 

(lower). 

In  lower  spring  cylinders 

Cn  front  end  of  spring  rods. . 
Cn  front  end  of  spring  rod . . 
In  upper  spring  cylinders . . . 
In  spring  cylmders  between 

springs. 
In  spring  separators 


Remarks. 


....do.... 
Taper  pin. 

do 

....do.... 
....do.... 
....do.... 
....do.... 


Cn  treadle  bars 

C  n  ele\ ating  pointer  worm. 

For  handle  (46L) 

In  elevating  nut  (56A) 

In  stop  plimger  (56C) 

In  stop  plunger  for  stop- 
plunger  rollers. 

On  stop  plunger  (56C) 

Oil  pipes  to  racer 

On  sides  of  head  on  elevat- 
ing screw. 

For  straps  27G,  27M,  27N, 
27P,  27F. 

At  rear  end  of  recoil  cylinder. 

For  vertical  shaft  (lower) 

For  collar  (44D) 

For  vertical  shaft  coupling 
(44K). 

For  tlirow-out  shaft  (51A) ... 

For  idler  fulcrum  (51F) 

For  throw-out  pinion 

For  coupling  (52N) 

For  indicator-shaft  couplings 
(54L). 

For  elevating-pin  nut  (55M). 

For  range-disk  fulcrum 

For  idler-sheave  pin 

For  traversing  shaft 

do 

For  hand  wheel  shaft 

do 


Taper  pins . 
do 


Taper  pin. 

do 

....do.... 


Throw-out  crank . 
Throw-out  gear. . 


Throw-out  gear  cover. 
Throw-out  gear  sup- 
port. 
Throw-out  housing . . . 


Throw-out  pinion . . . . 

Thrust  plates 

Throw-out  plugs 

Throw-out  plungers . . 
Throw-out      plunger 


For  crank  shaft 

For  slow-motion  shaft  coup- 
ling. 

For  worm  shaft 

For  clutch-fork  shaft 

....do 


springs. 
Throw-out  shaft . 


Throw-out  shaft  nut. 

"^      plates 

.^ersing  bracket . . 

\ersing  case 

versing  clutch — 
,-ersing  cranks . . . 
'raversing   crank- 
shaft brackets, 
t^ersinggear 


Top, 
Trav( 
Trav( 
Trav( 
Trav 


Trav( 


On  throw-out  shaft  (51A)  ... 

On  tln-ow-out  gear  support 
(olG). 

Over  throw-out  gear 

To  elevating  bracket-sup- 
porting throw-out  gear. 

Over  throw-out  crank  and 
attached  to  throw-out 
gear. 

On  horizontal  shaft 

Under  base  ring 

In  throw-out  housing  (51 M) 

In  throw-out  housing 

Operating  throw-out  plun- 
ger in  throw-out  housing. 

In  throw-out  gear  support 
attached  to  elevating 
bracket. 

On  throw-out  shaft  (51  A). . 

For  auxiliary  platform 

On  racer 

On  traversing  bracket 

On  traversing  shaft 

On  crank  shaft 

On  side  frames 


C.S 

C.  S.  No.  3.. 

F.  S.  No.  3.. 
F.  S.  No.  3.. 

F.  S.  No.  3.. 

F.  S.  No.  3.. 
F.  S.  No.  3.. 

Bz 

F.  S.  No.  3.. 
C.S 


Bz.  No.  4.. 

Bz.No.  3.. 

S 

F.S 

T.  S.  "B" 

S ,.... 

S 


Bz.No.  4.... 
S 

F.  S.  No.  3.. 


Bz.No.  2... 

S 

S 


F.  S.  No.  1. 

S 

s 

s 

s 


On  traversing  shaft . 


S 

S 

S 

S 

S 

s 

s 

S 

S 

s 

s 

s 

F.  S.  No.  3. 
Bz.No.  4... 

Fl.S 

Bz.No.  3... 

Bz.No.  3... 


Bz.  No.  4... 

S 

Bz.  No.  3... 
F.S.  No.  3. 

Sp.  S 

F.  S.  No.  1. 


S 

s 

C.S.  No.  2. 
C.S.  No.  2. 
Bz.No.  4... 

F.S 

C.  S.  No.  2. 

C.S.  No.  3. 


Tempered. 


0.125  thick. 


27 

CARRIAGE  PROPER— 12-INCH  BARBETTE  CARRIAGE  MODEL  OF  1917— Continued. 


Piece 
mark. 


No. 


Name  of  part. 


Locasion. 


Material. 


Remarks. 


A69M 


64T 
65H 
65K1 

lOK 
lOL 

64A 
76F 
76P 
76C 
21 E 
21B-21C 
A66L 
77C 
77F 
48G 
48M 

34B 
44H 


52H2 
44  Kl 

44B1 

44A1 

58F1 

65S 

77D 

77G 

A65C 

46C 

U39F 

o6E 

6oC 
68K 
68H 
65G 
59E 
65A1 

6oD 
lOF 

12D-12E 

12B 

59G 
59K 


Traversing  hand- 
wheel  direction 
plate. 

Traversing  pinion 

Traversing  rack 

Traversing-rack 
■Screws. 

Traversing  rollers 

Traversing-roller 
pins. 

Traversing  shaft 

Treadles 

Treadle  bars 

Treadle  springs 

Trunnion  bushings . . . 

Trunnion  caps 

Tubes 

-...do 

....do 

Upper  control  pinion . 

Upper  control  shaft. . . 


Valve  body 

Vertical  intermediate 
pinion. 


On  hand  wheel. 


Vertical  power  shaft. . 

Vertical -shaft   coup- 
ling. 

Vertical  shaft  (lower). 

Vertical  shaft  (upper) 

Washer 

....do 

....do 

....do 

-...do 

Washer  crown  nut 

Water  bucket 


Wiper  key. 


Worm 

Worm  bearing 

Worm- bearing  lock. 

Worm  gear 

Worm  housing 

Worm  shaft 


Worm-shaft  gear 

Wrench-hole  covers. . 

Wrench-hole    covers 

(front). 
Wrench-hole     covers 

(rear). 

Zero  strip 

Zero  strips 


On  traversing  shaft . 

In  base  ring 

For  traversing  rack . 


Between  racer  and  base  ring. 
In  traversing  rollers 


In  traversing  bracket 

Through  left  platform 

On  treadles 

In  spring  stirrups 

Trunnion  seat  in  side  frames. 

On  side  frames 

For  shoulder  rest 

For  elevating  crank 

For  traversing  cranks 

On  upper  control  shaft 

From  elevating  bracket  to 
control  bracket. 

In  bottom  of  recoil  cylinder. 

On  vertical  power  shaft  en- 
gaging with  horizontal  in- 
termediate gear  (44F1). 

Connecting  from  vertical 
shaft  (lower). 

Connecting  vertical  shaft 
(upper)  and  vertical  shaft 
(lower). 

Elevating  slow-motion  sys- 
tem, 
do. 


For  range-disk  fulcrum. 

For  sleeve 

For  elevating  crank 

For  traversing  crank . . . 

For  handle 

For  lever  fulcrum  pin . . 
With  carriage 


On  elevating  nut  for  elevat- 
ing screw  wiper. 

On  worm  shaft 

In  traversing  bracket 

On  traversing  bracket 

On  sleeve 

On  elevation-pointer  bracket 

From  worm-shaft  gear  to 
traversing  bracket. 

On  worm  shaft 

On  base  ring  opposite  inner 
foundation  bolts. 

At  point  of  racer  joint 


-do. 


On  worm  housing 

On  elevation  pointer. 


Bz 

S 

F.  S.  No.  2-- 
S 

C.  S.  No.3.. 
S 

F.  S.  No.3.. 
C.  S.  No.  2.. 
Bz.  No.  2.... 

Sp.S 

Bz.  No.  4.... 
C.  S.  No.  3.. 

R 

Br 

Br 

F.  S.  No.3.- 
F.  S.  No.3.. 

F.S.No.3... 
F.S.No.3... 


F.S.No.3.. 
F.S.No.l.. 


F.S.No.l.. 

F.S.No.l.. 

F.S 

Bz.No.4... 

S 

S 

s 

s 

Indurated 

fiber. 
S 

F.S.No.3.. 
C.S.No.2.. 
S 

Bz.No.4... 
C.S.No.3.. 
F.S.No.3.- 

Bz.No.3... 
S 

S 

s 

G.S 

G.S 


For  handwheel. 
Commercial. 


0.25  thick. 
Do. 
Do. 


28 


AZIMUTH  POINTER— 12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917. 


Piece 
mark. 

No. 

Name  of  part. 

Location. 

Material. 

Remarks. 

69C 

8 
88 
64 
80 

2 

64 

112 

56 

72 

1 

1 
10 

2 

1 

16 
8 
8 
2 

Bases 

For  azimuth  circle 

S      

69F 

Bolts,  tap 

do. 

s 

69G 

do 

do 

s 

69H 

do 

do 

S      . 

70F 

Collars 

On  screw 

Bz 

G.S       

70B 

Index 

In  slide 

70M 

Lid 

C.S 

Bz 

Bz 

Bz 

C.S 

S 

s 

s 

70D 

Nut 

In  pointer  body 

70N 

Pin 

For  lid 

70G1 

Pointer  body 

In  pointer  case  . . 

70K 

Pointer  case 

On  racer 

Rivets 

do 

do 

do 

do 

do 

do 

sunk. 
Do. 

s  .: 

69A 

Scale 

do          

Bz 

In  8  sections 

70E 

Screw 

In  pointer  body 

TobinBz.... 
Bz 

70L 

Screws,  countersunk 

head. 
Screws,  fllister  head. . . 
Screw,  filister  head . . . 

Sleeves 

For  pointer  case    . 

70H 

For  pointer  body     

Bz 

70C 

For  index 

Bz 

70P- 
70Q 
70A 

On  collar 

G.  S 

/One  R.  70P. 
\One  L.  7GQ. 

Slide 

In  pointer  body 

Bz 

69E 

Stiff  eners 

For  azimuth  circle  . . 

s 

69D 

Straps 

do 

s 

69B 

Supports 

do 

s 

Taper  pins 

For  screw 

G  S 

LIST  OF  PARTS  FOR  SHOT  TONGS  (7  PAIRS  FOR  EACH  CARRIAGE),  12-INCH  BARBETTE 

CARRIAGE,  MODEL  1917. 


NC16B 

2 
2 
1 
2 
2 
2 
1 
2 
1 
4 
2 
1 
1 
4 
4 

Cams 

In  frame 

Bz 

NC16D 

Cam  bolts 

For  cams.... 

F.S 

. 

NC16N 

Clevis 

In  frame 

F.S 

NC16K 

Clip  blocks 

On  rope. 

F.S 

NC16M 

Clip  nuts 

For  clip  blocks 

F.S 

NC16L 

Clip  washers 

Frame 

do 

Portable 

F.S 

NC16A 

C.S 

NC16F 

Links. 

In  cams 

F.S 

NC16P 

Nut 

S 

NC16E 

Nuts 

For  cam  bolt. 

s... 

312/j  thick 

Pins 

For  links 

s 

NC16H 

Ring. .. 

On  rope. 

F.S 

NC16J 

Rope 

On  links 

Wire  rope... 

F  S 

NC16G 

Rope  guides 

In  frame 

NC16C 

do 

F.S.     ..  . 

LIST  OF  PARTS  FOR  SPRING  COMPRESSOR  FOR  12-INCH  BARBETTE  CARRIAGE,  MODEL 

OF  1917. 


85D 

1 

85E 

1 

U244B 

1 

U244G\ 
U244H/ 

2 

U243A 

1 

U244N 

1 

U244L 

1 

U244K1 

1 

1 

4 

1 

1 

Ball  thrust  bearing . . 

do 

Bushing 

Centering  rings 

Coupling 

Compressor  crank 

Crank  fastening 

Frame  nut 

Grease  cup,  Lunken- 

heimer  No.  4  Tiger 

or  equal. 

Oil  plugs 

Pin 

....do 


For  worm 

For  worm  wheel 

In  spring  compressor  frame. 

/For  end  of  spring  compressor  X-rj,  Ar/^  o 
1    frame.  Miz.JNO./... 

In  spring  compressor  frame . . 
On  worm 

On  compressor  crank 

In  spring  compressor  frame . . 
For  spring  compressor  frame. 


In  spring  compressor  frame . , 
For  coupling 

For  spring  compressor  screw. 


Commercial. 
Do. 

/U244H,A=6.24. 
\U244G,A=6.11. 


Complete. 
Commercial. 


Driven. 


29 


SPRING  COMPRESSOR,  12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917. 


Piece 
mark. 

No. 

Name  of  material. 

Location. 

Material. 

Remarks. 

U244F 

1 
1 

1 

1 

2 

1 
1 
1 
1 
1 

In  spring  compressor  frame  . 
In  spring  compressor  screw.. 
Adjusted  to  recoil  band 

In  spring  compressor  frame. . 

In  spring  cylinders    

S 

U243C 

S 

U244E1 
U243B1 

Spring       compressor 

frame. 
Spring       compressor 

screw. 
Thread,  guard 

C.S.No.2... 
S 

U243D 

c 

U244P 

For  compressor  crank 

.  do 

Br 

U244M 

Washer 

S 

U244A 

Worm 

In  spring  compressor  frame. . 
do 

On  spring  compressor  screw. 

F.S.No.3... 
Bz.No.4.... 
Bz.No.4.... 

U244C1 
U244D 

Worm  nut 

Worm  wheel 

LIST  OF  PARTS  FOR  FILLING  DEVICE  FOR    12-INCH  BARBETTE  CARRIAGE,  MODEL 

OF  1917. 


U251G 

1 

} 

1 

Aircock,  lever  handle. 
EllO  5 

For  filling  funnel  . 

Br 

Lunkenheimer  fig. 
980  or  equal. ' 

U251C 

do 

Br 

XT 251 B 

Ferrule 

do 

Bz 

U251A 

.  ..do 

C 

0.062  {^)  thick. 

U251E 

Nipple  0  5  by  3 

do.    .                   

Br 

U251N 

Nut 

do 

Bz 

U251L 

Pipe 

do 

do 

do. 

Br 

46. 5  long. 

U251M 

Br 

58.5  long. 

U251P 

do 

Bz 

U251Q 
U251D 

TeeO  5 

.do 

Br 

Union  0.5 

do 

Bz 

Lunkenheimer  ifig . 

U251F 

Washer 

.do 

Lea...  .  .  . 

457  or  equal. 
0.125  thick. 

GREASE  CUPS  (18  PER  CARRIAGE),  12-INCH  BARBETTE  CARRIAGE,  MODEL  OF  1917 


A2A 

A23 

A2D1 


A2E3 
A2J 
A2G 
A2H 

A2F 
A2C1 
A2K 


Body 

Cap 

Cup,  leather. 
Gaskets 

Pin 

Plunger 

Plunger  nut . 
Screw,  round 
Screw 

Spring 

Washer 

Washer,  lock 


Screwed  into  carriage 

On  body 

Under  plunger 

Between  body  and  oil  pipe 
when  grease  cup  is  seated 
on  pipe  connection. 

In  plunger 

Inside  body 

On  plunger 

For  plunger 

Secures  cup  leather  to 
plunger. 

Between  cap  and  plunger. . 

Under  cup  leather 

For  plunger 


Bz 
Bz 
Lei 
C. 

Bz 
Bz 
Bz 
Bz 
Bz 

S., 
Bz 


War  Department, 

Office  of  the  Chief  of  Ordnance, 

Washington,  August  8, 1917. 

Form  No.  1722. 

Ed.  Aug.  8-17—1,000.  ^ 


<-;'  "5       K'''^P       \>,. 


14  DAY  USE 

RETURN  TO  DESK  FROM  WHICH  BORROWED 

LOAN  DEPT. 

Ttis  book  is  due  on  the  last  date  stamped  below,  ot 
on  the  date  to  which  renewed. 

Renewed  books  are.  subject  to  immediate  recaU. 


j^ 


.^^'^ 


^ 


LD  2lA-50m-8,'61 
(C1795sl0)476B 


General  Library     , 
University  of  California 
Berkeley 


Cay/ord  Bros. 

Makers 
Syracuse,  n    y 


YC  6434 


^7 

"-.  U  '= 

•-■(■( 

;  I  Hn  B 

UNIVERSITY  OF  CAUFORNIA  UBRARY 

'■■  »■  *-  X 


5^       >  kl.l»    ^*' 


